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Finding the Fourth Proportional to 709,167.66, 978,676.02 and 386,895.48

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Solution

The fourth proportional to 709,167.66, 978,676.02 and 386,895.48 is: 533,929.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,167.66 : 978,676.02 = 386,895.48 : x
  2. Step 2: Convert to fraction form
    709,167.66/978,676.02 = 386,895.48/x
  3. Step 3: Cross multiply
    709,167.66x = 978,676.02 × 386,895.48
  4. Step 4: Simplify right side
    709,167.66x = 378,645,328,522.39
  5. Step 5: Solve for x
    x = 378,645,328,522.39/709,167.66
  6. Step 6: Final answer
    x = 533,929.21

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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.