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Finding the Fourth Proportional to 620,730.96, 856,708.56 and 580,209.12

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Solution

The fourth proportional to 620,730.96, 856,708.56 and 580,209.12 is: 800,781.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,730.96 : 856,708.56 = 580,209.12 : x
  2. Step 2: Convert to fraction form
    620,730.96/856,708.56 = 580,209.12/x
  3. Step 3: Cross multiply
    620,730.96x = 856,708.56 × 580,209.12
  4. Step 4: Simplify right side
    620,730.96x = 497,070,119,694.07
  5. Step 5: Solve for x
    x = 497,070,119,694.07/620,730.96
  6. Step 6: Final answer
    x = 800,781.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.