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Finding the Fourth Proportional to 539,081.70, 808,622.55 and 329,129.70

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Solution

The fourth proportional to 539,081.70, 808,622.55 and 329,129.70 is: 493,694.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,081.70 : 808,622.55 = 329,129.70 : x
  2. Step 2: Convert to fraction form
    539,081.70/808,622.55 = 329,129.70/x
  3. Step 3: Cross multiply
    539,081.70x = 808,622.55 × 329,129.70
  4. Step 4: Simplify right side
    539,081.70x = 266,141,697,294.74
  5. Step 5: Solve for x
    x = 266,141,697,294.74/539,081.70
  6. Step 6: Final answer
    x = 493,694.55

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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.