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Finding the Fourth Proportional to 488,085.60, 732,128.40 and 172,574.40

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Solution

The fourth proportional to 488,085.60, 732,128.40 and 172,574.40 is: 258,861.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,085.60 : 732,128.40 = 172,574.40 : x
  2. Step 2: Convert to fraction form
    488,085.60/732,128.40 = 172,574.40/x
  3. Step 3: Cross multiply
    488,085.60x = 732,128.40 × 172,574.40
  4. Step 4: Simplify right side
    488,085.60x = 126,346,619,352.96
  5. Step 5: Solve for x
    x = 126,346,619,352.96/488,085.60
  6. Step 6: Final answer
    x = 258,861.60

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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.