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Finding the Fourth Proportional to 1,399,777.45, 1,931,729.00 and 787,952.10

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Solution

The fourth proportional to 1,399,777.45, 1,931,729.00 and 787,952.10 is: 1,087,394.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,777.45 : 1,931,729.00 = 787,952.10 : x
  2. Step 2: Convert to fraction form
    1,399,777.45/1,931,729.00 = 787,952.10/x
  3. Step 3: Cross multiply
    1,399,777.45x = 1,931,729.00 × 787,952.10
  4. Step 4: Simplify right side
    1,399,777.45x = 1,522,109,932,044.79
  5. Step 5: Solve for x
    x = 1,522,109,932,044.79/1,399,777.45
  6. Step 6: Final answer
    x = 1,087,394.24

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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.