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Finding the Fourth Proportional to 638,265.60, 956,134.80 and 413,782.20

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Solution

The fourth proportional to 638,265.60, 956,134.80 and 413,782.20 is: 619,854.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,265.60 : 956,134.80 = 413,782.20 : x
  2. Step 2: Convert to fraction form
    638,265.60/956,134.80 = 413,782.20/x
  3. Step 3: Cross multiply
    638,265.60x = 956,134.80 × 413,782.20
  4. Step 4: Simplify right side
    638,265.60x = 395,631,561,040.56
  5. Step 5: Solve for x
    x = 395,631,561,040.56/638,265.60
  6. Step 6: Final answer
    x = 619,854.12

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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.