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Finding the Fourth Proportional to 478,490.09, 717,833.54 and 328,800.87

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Solution

The fourth proportional to 478,490.09, 717,833.54 and 328,800.87 is: 493,268.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,490.09 : 717,833.54 = 328,800.87 : x
  2. Step 2: Convert to fraction form
    478,490.09/717,833.54 = 328,800.87/x
  3. Step 3: Cross multiply
    478,490.09x = 717,833.54 × 328,800.87
  4. Step 4: Simplify right side
    478,490.09x = 236,024,293,289.18
  5. Step 5: Solve for x
    x = 236,024,293,289.18/478,490.09
  6. Step 6: Final answer
    x = 493,268.93

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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.