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Finding the Fourth Proportional to 478,269.36, 717,502.86 and 399,931.02

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Solution

The fourth proportional to 478,269.36, 717,502.86 and 399,931.02 is: 599,979.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,269.36 : 717,502.86 = 399,931.02 : x
  2. Step 2: Convert to fraction form
    478,269.36/717,502.86 = 399,931.02/x
  3. Step 3: Cross multiply
    478,269.36x = 717,502.86 × 399,931.02
  4. Step 4: Simplify right side
    478,269.36x = 286,951,650,652.72
  5. Step 5: Solve for x
    x = 286,951,650,652.72/478,269.36
  6. Step 6: Final answer
    x = 599,979.16

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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.