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Finding the Fourth Proportional to 315,634.55, 435,575.68 and 172,394.93

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Solution

The fourth proportional to 315,634.55, 435,575.68 and 172,394.93 is: 237,905.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,634.55 : 435,575.68 = 172,394.93 : x
  2. Step 2: Convert to fraction form
    315,634.55/435,575.68 = 172,394.93/x
  3. Step 3: Cross multiply
    315,634.55x = 435,575.68 × 172,394.93
  4. Step 4: Simplify right side
    315,634.55x = 75,091,038,001.33
  5. Step 5: Solve for x
    x = 75,091,038,001.33/315,634.55
  6. Step 6: Final answer
    x = 237,905.00

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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.