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Finding the Fourth Proportional to 639,226.92, 881,864.76 and 448,365

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Solution

The fourth proportional to 639,226.92, 881,864.76 and 448,365 is: 618,555.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,226.92 : 881,864.76 = 448,365 : x
  2. Step 2: Convert to fraction form
    639,226.92/881,864.76 = 448,365/x
  3. Step 3: Cross multiply
    639,226.92x = 881,864.76 × 448,365
  4. Step 4: Simplify right side
    639,226.92x = 395,397,293,117.40
  5. Step 5: Solve for x
    x = 395,397,293,117.40/639,226.92
  6. Step 6: Final answer
    x = 618,555.45

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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.