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Finding the Fourth Proportional to 663,421.31, 914,797.91 and 448,187.66

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Solution

The fourth proportional to 663,421.31, 914,797.91 and 448,187.66 is: 618,010.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,421.31 : 914,797.91 = 448,187.66 : x
  2. Step 2: Convert to fraction form
    663,421.31/914,797.91 = 448,187.66/x
  3. Step 3: Cross multiply
    663,421.31x = 914,797.91 × 448,187.66
  4. Step 4: Simplify right side
    663,421.31x = 410,001,134,655.79
  5. Step 5: Solve for x
    x = 410,001,134,655.79/663,421.31
  6. Step 6: Final answer
    x = 618,010.20

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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.