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Finding the Fourth Proportional to 385,027.20, 577,540.80 and 291,715.20

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Solution

The fourth proportional to 385,027.20, 577,540.80 and 291,715.20 is: 437,572.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,027.20 : 577,540.80 = 291,715.20 : x
  2. Step 2: Convert to fraction form
    385,027.20/577,540.80 = 291,715.20/x
  3. Step 3: Cross multiply
    385,027.20x = 577,540.80 × 291,715.20
  4. Step 4: Simplify right side
    385,027.20x = 168,477,429,980.16
  5. Step 5: Solve for x
    x = 168,477,429,980.16/385,027.20
  6. Step 6: Final answer
    x = 437,572.80

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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.