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Finding the Fourth Proportional to 488,010.63, 730,742.72 and 392,720.33

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Solution

The fourth proportional to 488,010.63, 730,742.72 and 392,720.33 is: 588,055.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,010.63 : 730,742.72 = 392,720.33 : x
  2. Step 2: Convert to fraction form
    488,010.63/730,742.72 = 392,720.33/x
  3. Step 3: Cross multiply
    488,010.63x = 730,742.72 × 392,720.33
  4. Step 4: Simplify right side
    488,010.63x = 286,977,516,526.18
  5. Step 5: Solve for x
    x = 286,977,516,526.18/488,010.63
  6. Step 6: Final answer
    x = 588,055.87

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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.