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Finding the Fourth Proportional to 315,452.40, 435,330.90 and 172,218.48

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Solution

The fourth proportional to 315,452.40, 435,330.90 and 172,218.48 is: 237,665.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,452.40 : 435,330.90 = 172,218.48 : x
  2. Step 2: Convert to fraction form
    315,452.40/435,330.90 = 172,218.48/x
  3. Step 3: Cross multiply
    315,452.40x = 435,330.90 × 172,218.48
  4. Step 4: Simplify right side
    315,452.40x = 74,972,025,895.03
  5. Step 5: Solve for x
    x = 74,972,025,895.03/315,452.40
  6. Step 6: Final answer
    x = 237,665.10

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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.