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Finding the Fourth Proportional to 287,291.70, 430,937.55 and 109,707.30

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Solution

The fourth proportional to 287,291.70, 430,937.55 and 109,707.30 is: 164,560.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,291.70 : 430,937.55 = 109,707.30 : x
  2. Step 2: Convert to fraction form
    287,291.70/430,937.55 = 109,707.30/x
  3. Step 3: Cross multiply
    287,291.70x = 430,937.55 × 109,707.30
  4. Step 4: Simplify right side
    287,291.70x = 47,276,995,079.12
  5. Step 5: Solve for x
    x = 47,276,995,079.12/287,291.70
  6. Step 6: Final answer
    x = 164,560.95

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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.