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Finding the Fourth Proportional to 287,360.30, 431,040.45 and 112,256.30

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Solution

The fourth proportional to 287,360.30, 431,040.45 and 112,256.30 is: 168,384.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,360.30 : 431,040.45 = 112,256.30 : x
  2. Step 2: Convert to fraction form
    287,360.30/431,040.45 = 112,256.30/x
  3. Step 3: Cross multiply
    287,360.30x = 431,040.45 × 112,256.30
  4. Step 4: Simplify right side
    287,360.30x = 48,387,006,067.34
  5. Step 5: Solve for x
    x = 48,387,006,067.34/287,360.30
  6. Step 6: Final answer
    x = 168,384.45

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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.