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Finding the Fourth Proportional to 707,422.99, 976,264.17 and 385,138.57

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Solution

The fourth proportional to 707,422.99, 976,264.17 and 385,138.57 is: 531,502.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,422.99 : 976,264.17 = 385,138.57 : x
  2. Step 2: Convert to fraction form
    707,422.99/976,264.17 = 385,138.57/x
  3. Step 3: Cross multiply
    707,422.99x = 976,264.17 × 385,138.57
  4. Step 4: Simplify right side
    707,422.99x = 375,996,986,376.04
  5. Step 5: Solve for x
    x = 375,996,986,376.04/707,422.99
  6. Step 6: Final answer
    x = 531,502.36

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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.