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Finding the Fourth Proportional to 1,296,747.12, 1,787,368.92 and 866,870.40

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Solution

The fourth proportional to 1,296,747.12, 1,787,368.92 and 866,870.40 is: 1,194,849.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,747.12 : 1,787,368.92 = 866,870.40 : x
  2. Step 2: Convert to fraction form
    1,296,747.12/1,787,368.92 = 866,870.40/x
  3. Step 3: Cross multiply
    1,296,747.12x = 1,787,368.92 × 866,870.40
  4. Step 4: Simplify right side
    1,296,747.12x = 1,549,417,210,627.97
  5. Step 5: Solve for x
    x = 1,549,417,210,627.97/1,296,747.12
  6. Step 6: Final answer
    x = 1,194,849.16

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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.