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Finding the Fourth Proportional to 287,047.80, 430,398.90 and 147,079.80

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Solution

The fourth proportional to 287,047.80, 430,398.90 and 147,079.80 is: 220,531.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,047.80 : 430,398.90 = 147,079.80 : x
  2. Step 2: Convert to fraction form
    287,047.80/430,398.90 = 147,079.80/x
  3. Step 3: Cross multiply
    287,047.80x = 430,398.90 × 147,079.80
  4. Step 4: Simplify right side
    287,047.80x = 63,302,984,132.22
  5. Step 5: Solve for x
    x = 63,302,984,132.22/287,047.80
  6. Step 6: Final answer
    x = 220,531.16

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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.