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Finding the Fourth Proportional to 315,455.40, 435,335.04 and 172,221.48

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Solution

The fourth proportional to 315,455.40, 435,335.04 and 172,221.48 is: 237,669.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,455.40 : 435,335.04 = 172,221.48 : x
  2. Step 2: Convert to fraction form
    315,455.40/435,335.04 = 172,221.48/x
  3. Step 3: Cross multiply
    315,455.40x = 435,335.04 × 172,221.48
  4. Step 4: Simplify right side
    315,455.40x = 74,974,044,884.66
  5. Step 5: Solve for x
    x = 74,974,044,884.66/315,455.40
  6. Step 6: Final answer
    x = 237,669.24

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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.