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Finding the Fourth Proportional to 287,523.20, 431,284.80 and 130,059.20

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Solution

The fourth proportional to 287,523.20, 431,284.80 and 130,059.20 is: 195,088.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,523.20 : 431,284.80 = 130,059.20 : x
  2. Step 2: Convert to fraction form
    287,523.20/431,284.80 = 130,059.20/x
  3. Step 3: Cross multiply
    287,523.20x = 431,284.80 × 130,059.20
  4. Step 4: Simplify right side
    287,523.20x = 56,092,556,060.16
  5. Step 5: Solve for x
    x = 56,092,556,060.16/287,523.20
  6. Step 6: Final answer
    x = 195,088.80

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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.