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Finding the Fourth Proportional to 315,684.60, 435,637.56 and 172,445.28

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Solution

The fourth proportional to 315,684.60, 435,637.56 and 172,445.28 is: 237,970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,684.60 : 435,637.56 = 172,445.28 : x
  2. Step 2: Convert to fraction form
    315,684.60/435,637.56 = 172,445.28/x
  3. Step 3: Cross multiply
    315,684.60x = 435,637.56 × 172,445.28
  4. Step 4: Simplify right side
    315,684.60x = 75,123,641,012.72
  5. Step 5: Solve for x
    x = 75,123,641,012.72/315,684.60
  6. Step 6: Final answer
    x = 237,970.56

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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.