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Finding the Fourth Proportional to 1,191,566.40, 1,787,349.60 and 719,707.20

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Solution

The fourth proportional to 1,191,566.40, 1,787,349.60 and 719,707.20 is: 1,079,560.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191,566.40 : 1,787,349.60 = 719,707.20 : x
  2. Step 2: Convert to fraction form
    1,191,566.40/1,787,349.60 = 719,707.20/x
  3. Step 3: Cross multiply
    1,191,566.40x = 1,787,349.60 × 719,707.20
  4. Step 4: Simplify right side
    1,191,566.40x = 1,286,368,376,037.12
  5. Step 5: Solve for x
    x = 1,286,368,376,037.12/1,191,566.40
  6. Step 6: Final answer
    x = 1,079,560.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.