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Finding the Fourth Proportional to 645,713.68, 891,097.32 and 377,597.20

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Solution

The fourth proportional to 645,713.68, 891,097.32 and 377,597.20 is: 521,091.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,713.68 : 891,097.32 = 377,597.20 : x
  2. Step 2: Convert to fraction form
    645,713.68/891,097.32 = 377,597.20/x
  3. Step 3: Cross multiply
    645,713.68x = 891,097.32 × 377,597.20
  4. Step 4: Simplify right side
    645,713.68x = 336,475,852,959.50
  5. Step 5: Solve for x
    x = 336,475,852,959.50/645,713.68
  6. Step 6: Final answer
    x = 521,091.41

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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.