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Finding the Fourth Proportional to 502,561.80, 753,842.70 and 289,985.40

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Solution

The fourth proportional to 502,561.80, 753,842.70 and 289,985.40 is: 434,978.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,561.80 : 753,842.70 = 289,985.40 : x
  2. Step 2: Convert to fraction form
    502,561.80/753,842.70 = 289,985.40/x
  3. Step 3: Cross multiply
    502,561.80x = 753,842.70 × 289,985.40
  4. Step 4: Simplify right side
    502,561.80x = 218,603,376,896.58
  5. Step 5: Solve for x
    x = 218,603,376,896.58/502,561.80
  6. Step 6: Final answer
    x = 434,978.10

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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.