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Finding the Fourth Proportional to 768,417.72, 1,060,318.64 and 428,900.28

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Solution

The fourth proportional to 768,417.72, 1,060,318.64 and 428,900.28 is: 591,827.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,417.72 : 1,060,318.64 = 428,900.28 : x
  2. Step 2: Convert to fraction form
    768,417.72/1,060,318.64 = 428,900.28/x
  3. Step 3: Cross multiply
    768,417.72x = 1,060,318.64 × 428,900.28
  4. Step 4: Simplify right side
    768,417.72x = 454,770,961,585.22
  5. Step 5: Solve for x
    x = 454,770,961,585.22/768,417.72
  6. Step 6: Final answer
    x = 591,827.79

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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.