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Finding the Fourth Proportional to 768,304.80, 1,060,287.12 and 428,836.32

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Solution

The fourth proportional to 768,304.80, 1,060,287.12 and 428,836.32 is: 591,808.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,304.80 : 1,060,287.12 = 428,836.32 : x
  2. Step 2: Convert to fraction form
    768,304.80/1,060,287.12 = 428,836.32/x
  3. Step 3: Cross multiply
    768,304.80x = 1,060,287.12 × 428,836.32
  4. Step 4: Simplify right side
    768,304.80x = 454,689,626,684.20
  5. Step 5: Solve for x
    x = 454,689,626,684.20/768,304.80
  6. Step 6: Final answer
    x = 591,808.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.