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Finding the Fourth Proportional to 287,079.13, 430,710.90 and 87,438.16

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Solution

The fourth proportional to 287,079.13, 430,710.90 and 87,438.16 is: 131,185.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,079.13 : 430,710.90 = 87,438.16 : x
  2. Step 2: Convert to fraction form
    287,079.13/430,710.90 = 87,438.16/x
  3. Step 3: Cross multiply
    287,079.13x = 430,710.90 × 87,438.16
  4. Step 4: Simplify right side
    287,079.13x = 37,660,568,587.94
  5. Step 5: Solve for x
    x = 37,660,568,587.94/287,079.13
  6. Step 6: Final answer
    x = 131,185.32

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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.