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Finding the Fourth Proportional to 315,907.68, 435,951.54 and 172,667.64

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Solution

The fourth proportional to 315,907.68, 435,951.54 and 172,667.64 is: 238,280.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,907.68 : 435,951.54 = 172,667.64 : x
  2. Step 2: Convert to fraction form
    315,907.68/435,951.54 = 172,667.64/x
  3. Step 3: Cross multiply
    315,907.68x = 435,951.54 × 172,667.64
  4. Step 4: Simplify right side
    315,907.68x = 75,274,723,566.17
  5. Step 5: Solve for x
    x = 75,274,723,566.17/315,907.68
  6. Step 6: Final answer
    x = 238,280.76

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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.