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Finding the Fourth Proportional to 660,607.80, 990,911.70 and 503,143.80

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Solution

The fourth proportional to 660,607.80, 990,911.70 and 503,143.80 is: 754,715.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,607.80 : 990,911.70 = 503,143.80 : x
  2. Step 2: Convert to fraction form
    660,607.80/990,911.70 = 503,143.80/x
  3. Step 3: Cross multiply
    660,607.80x = 990,911.70 × 503,143.80
  4. Step 4: Simplify right side
    660,607.80x = 498,571,078,202.46
  5. Step 5: Solve for x
    x = 498,571,078,202.46/660,607.80
  6. Step 6: Final answer
    x = 754,715.70

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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.