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Finding the Fourth Proportional to 287,360.10, 431,040.15 and 100,347.30

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Solution

The fourth proportional to 287,360.10, 431,040.15 and 100,347.30 is: 150,520.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,360.10 : 431,040.15 = 100,347.30 : x
  2. Step 2: Convert to fraction form
    287,360.10/431,040.15 = 100,347.30/x
  3. Step 3: Cross multiply
    287,360.10x = 431,040.15 × 100,347.30
  4. Step 4: Simplify right side
    287,360.10x = 43,253,715,244.10
  5. Step 5: Solve for x
    x = 43,253,715,244.10/287,360.10
  6. Step 6: Final answer
    x = 150,520.95

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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.