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Finding the Fourth Proportional to 660,215.80, 990,323.70 and 584,108.20

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Solution

The fourth proportional to 660,215.80, 990,323.70 and 584,108.20 is: 876,162.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,215.80 : 990,323.70 = 584,108.20 : x
  2. Step 2: Convert to fraction form
    660,215.80/990,323.70 = 584,108.20/x
  3. Step 3: Cross multiply
    660,215.80x = 990,323.70 × 584,108.20
  4. Step 4: Simplify right side
    660,215.80x = 578,456,193,824.34
  5. Step 5: Solve for x
    x = 578,456,193,824.34/660,215.80
  6. Step 6: Final answer
    x = 876,162.30

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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.