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Finding the Fourth Proportional to 645,754.68, 891,127.56 and 373,834.08

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Solution

The fourth proportional to 645,754.68, 891,127.56 and 373,834.08 is: 515,882.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,754.68 : 891,127.56 = 373,834.08 : x
  2. Step 2: Convert to fraction form
    645,754.68/891,127.56 = 373,834.08/x
  3. Step 3: Cross multiply
    645,754.68x = 891,127.56 × 373,834.08
  4. Step 4: Simplify right side
    645,754.68x = 333,133,851,555.25
  5. Step 5: Solve for x
    x = 333,133,851,555.25/645,754.68
  6. Step 6: Final answer
    x = 515,882.98

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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.