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Finding the Fourth Proportional to 478,502.40, 718,822.80 and 399,770.40

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Solution

The fourth proportional to 478,502.40, 718,822.80 and 399,770.40 is: 600,548.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,502.40 : 718,822.80 = 399,770.40 : x
  2. Step 2: Convert to fraction form
    478,502.40/718,822.80 = 399,770.40/x
  3. Step 3: Cross multiply
    478,502.40x = 718,822.80 × 399,770.40
  4. Step 4: Simplify right side
    478,502.40x = 287,364,078,285.12
  5. Step 5: Solve for x
    x = 287,364,078,285.12/478,502.40
  6. Step 6: Final answer
    x = 600,548.88

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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.