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Finding the Fourth Proportional to 750,872.88, 1,036,278.88 and 428,631.40

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Solution

The fourth proportional to 750,872.88, 1,036,278.88 and 428,631.40 is: 591,553.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    750,872.88 : 1,036,278.88 = 428,631.40 : x
  2. Step 2: Convert to fraction form
    750,872.88/1,036,278.88 = 428,631.40/x
  3. Step 3: Cross multiply
    750,872.88x = 1,036,278.88 × 428,631.40
  4. Step 4: Simplify right side
    750,872.88x = 444,181,667,124.83
  5. Step 5: Solve for x
    x = 444,181,667,124.83/750,872.88
  6. Step 6: Final answer
    x = 591,553.75

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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.