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Finding the Fourth Proportional to 287,319.42, 431,126.76 and 127,504.86

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Solution

The fourth proportional to 287,319.42, 431,126.76 and 127,504.86 is: 191,322.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,319.42 : 431,126.76 = 127,504.86 : x
  2. Step 2: Convert to fraction form
    287,319.42/431,126.76 = 127,504.86/x
  3. Step 3: Cross multiply
    287,319.42x = 431,126.76 × 127,504.86
  4. Step 4: Simplify right side
    287,319.42x = 54,970,757,176.05
  5. Step 5: Solve for x
    x = 54,970,757,176.05/287,319.42
  6. Step 6: Final answer
    x = 191,322.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.