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Finding the Fourth Proportional to 315,289.30, 435,108.47 and 172,058.58

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Solution

The fourth proportional to 315,289.30, 435,108.47 and 172,058.58 is: 237,445.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,289.30 : 435,108.47 = 172,058.58 : x
  2. Step 2: Convert to fraction form
    315,289.30/435,108.47 = 172,058.58/x
  3. Step 3: Cross multiply
    315,289.30x = 435,108.47 × 172,058.58
  4. Step 4: Simplify right side
    315,289.30x = 74,864,145,494.17
  5. Step 5: Solve for x
    x = 74,864,145,494.17/315,289.30
  6. Step 6: Final answer
    x = 237,445.88

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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.