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Finding the Fourth Proportional to 660,306.80, 990,460.20 and 555,330.80

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Solution

The fourth proportional to 660,306.80, 990,460.20 and 555,330.80 is: 832,996.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,306.80 : 990,460.20 = 555,330.80 : x
  2. Step 2: Convert to fraction form
    660,306.80/990,460.20 = 555,330.80/x
  3. Step 3: Cross multiply
    660,306.80x = 990,460.20 × 555,330.80
  4. Step 4: Simplify right side
    660,306.80x = 550,033,055,234.16
  5. Step 5: Solve for x
    x = 550,033,055,234.16/660,306.80
  6. Step 6: Final answer
    x = 832,996.20

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.