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Finding the Fourth Proportional to 487,790.60, 730,811.10 and 417,806.60

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Solution

The fourth proportional to 487,790.60, 730,811.10 and 417,806.60 is: 625,960.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,790.60 : 730,811.10 = 417,806.60 : x
  2. Step 2: Convert to fraction form
    487,790.60/730,811.10 = 417,806.60/x
  3. Step 3: Cross multiply
    487,790.60x = 730,811.10 × 417,806.60
  4. Step 4: Simplify right side
    487,790.60x = 305,337,700,933.26
  5. Step 5: Solve for x
    x = 305,337,700,933.26/487,790.60
  6. Step 6: Final answer
    x = 625,960.61

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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.