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Finding the Fourth Proportional to 522,160.97, 720,528 and 307,288.22

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Solution

The fourth proportional to 522,160.97, 720,528 and 307,288.22 is: 424,025.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,160.97 : 720,528 = 307,288.22 : x
  2. Step 2: Convert to fraction form
    522,160.97/720,528 = 307,288.22/x
  3. Step 3: Cross multiply
    522,160.97x = 720,528 × 307,288.22
  4. Step 4: Simplify right side
    522,160.97x = 221,409,766,580.16
  5. Step 5: Solve for x
    x = 221,409,766,580.16/522,160.97
  6. Step 6: Final answer
    x = 424,025.88

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1.5x scale

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.