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Finding the Fourth Proportional to 251,468.72, 347,019.89 and 138,291.47

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Solution

The fourth proportional to 251,468.72, 347,019.89 and 138,291.47 is: 190,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,468.72 : 347,019.89 = 138,291.47 : x
  2. Step 2: Convert to fraction form
    251,468.72/347,019.89 = 138,291.47/x
  3. Step 3: Cross multiply
    251,468.72x = 347,019.89 × 138,291.47
  4. Step 4: Simplify right side
    251,468.72x = 47,989,888,280.78
  5. Step 5: Solve for x
    x = 47,989,888,280.78/251,468.72
  6. Step 6: Final answer
    x = 190,838.40

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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.