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Finding the Fourth Proportional to 679,776.48, 938,079.36 and 377,964

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Solution

The fourth proportional to 679,776.48, 938,079.36 and 377,964 is: 521,583.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,776.48 : 938,079.36 = 377,964 : x
  2. Step 2: Convert to fraction form
    679,776.48/938,079.36 = 377,964/x
  3. Step 3: Cross multiply
    679,776.48x = 938,079.36 × 377,964
  4. Step 4: Simplify right side
    679,776.48x = 354,560,227,223.04
  5. Step 5: Solve for x
    x = 354,560,227,223.04/679,776.48
  6. Step 6: Final answer
    x = 521,583.55

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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.