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Finding the Fourth Proportional to 610,421.20, 915,631.80 and 545,102.80

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Solution

The fourth proportional to 610,421.20, 915,631.80 and 545,102.80 is: 817,654.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,421.20 : 915,631.80 = 545,102.80 : x
  2. Step 2: Convert to fraction form
    610,421.20/915,631.80 = 545,102.80/x
  3. Step 3: Cross multiply
    610,421.20x = 915,631.80 × 545,102.80
  4. Step 4: Simplify right side
    610,421.20x = 499,113,457,949.04
  5. Step 5: Solve for x
    x = 499,113,457,949.04/610,421.20
  6. Step 6: Final answer
    x = 817,654.20

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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.