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Finding the Fourth Proportional to 287,729.01, 431,086.86 and 256,417.25

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Solution

The fourth proportional to 287,729.01, 431,086.86 and 256,417.25 is: 384,174.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,729.01 : 431,086.86 = 256,417.25 : x
  2. Step 2: Convert to fraction form
    287,729.01/431,086.86 = 256,417.25/x
  3. Step 3: Cross multiply
    287,729.01x = 431,086.86 × 256,417.25
  4. Step 4: Simplify right side
    287,729.01x = 110,538,104,996.90
  5. Step 5: Solve for x
    x = 110,538,104,996.90/287,729.01
  6. Step 6: Final answer
    x = 384,174.35

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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.