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Finding the Fourth Proportional to 485,412.24, 724,320.78 and 434,978.76

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Solution

The fourth proportional to 485,412.24, 724,320.78 and 434,978.76 is: 649,065.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,412.24 : 724,320.78 = 434,978.76 : x
  2. Step 2: Convert to fraction form
    485,412.24/724,320.78 = 434,978.76/x
  3. Step 3: Cross multiply
    485,412.24x = 724,320.78 × 434,978.76
  4. Step 4: Simplify right side
    485,412.24x = 315,064,154,726.63
  5. Step 5: Solve for x
    x = 315,064,154,726.63/485,412.24
  6. Step 6: Final answer
    x = 649,065.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.