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Finding the Fourth Proportional to 315,554.76, 435,469.14 and 172,316.52

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Solution

The fourth proportional to 315,554.76, 435,469.14 and 172,316.52 is: 237,798.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,554.76 : 435,469.14 = 172,316.52 : x
  2. Step 2: Convert to fraction form
    315,554.76/435,469.14 = 172,316.52/x
  3. Step 3: Cross multiply
    315,554.76x = 435,469.14 × 172,316.52
  4. Step 4: Simplify right side
    315,554.76x = 75,038,526,772.19
  5. Step 5: Solve for x
    x = 75,038,526,772.19/315,554.76
  6. Step 6: Final answer
    x = 237,798.75

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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.