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Finding the Fourth Proportional to 576,019.20, 865,065.60 and 418,425.60

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Solution

The fourth proportional to 576,019.20, 865,065.60 and 418,425.60 is: 628,391.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,019.20 : 865,065.60 = 418,425.60 : x
  2. Step 2: Convert to fraction form
    576,019.20/865,065.60 = 418,425.60/x
  3. Step 3: Cross multiply
    576,019.20x = 865,065.60 × 418,425.60
  4. Step 4: Simplify right side
    576,019.20x = 361,965,592,719.36
  5. Step 5: Solve for x
    x = 361,965,592,719.36/576,019.20
  6. Step 6: Final answer
    x = 628,391.54

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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.