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Finding the Fourth Proportional to 472,149.20, 651,565.92 and 257,289.21

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Solution

The fourth proportional to 472,149.20, 651,565.92 and 257,289.21 is: 355,059.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,149.20 : 651,565.92 = 257,289.21 : x
  2. Step 2: Convert to fraction form
    472,149.20/651,565.92 = 257,289.21/x
  3. Step 3: Cross multiply
    472,149.20x = 651,565.92 × 257,289.21
  4. Step 4: Simplify right side
    472,149.20x = 167,640,881,784.56
  5. Step 5: Solve for x
    x = 167,640,881,784.56/472,149.20
  6. Step 6: Final answer
    x = 355,059.12

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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.