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Finding the Fourth Proportional to 485,861.60, 728,475.60 and 436,095.20

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Solution

The fourth proportional to 485,861.60, 728,475.60 and 436,095.20 is: 653,858.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,861.60 : 728,475.60 = 436,095.20 : x
  2. Step 2: Convert to fraction form
    485,861.60/728,475.60 = 436,095.20/x
  3. Step 3: Cross multiply
    485,861.60x = 728,475.60 × 436,095.20
  4. Step 4: Simplify right side
    485,861.60x = 317,684,712,477.12
  5. Step 5: Solve for x
    x = 317,684,712,477.12/485,861.60
  6. Step 6: Final answer
    x = 653,858.45

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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.