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Finding the Fourth Proportional to 879,470.40, 1,317,650.40 and 745,723.20

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Solution

The fourth proportional to 879,470.40, 1,317,650.40 and 745,723.20 is: 1,117,266.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,470.40 : 1,317,650.40 = 745,723.20 : x
  2. Step 2: Convert to fraction form
    879,470.40/1,317,650.40 = 745,723.20/x
  3. Step 3: Cross multiply
    879,470.40x = 1,317,650.40 × 745,723.20
  4. Step 4: Simplify right side
    879,470.40x = 982,602,472,769.28
  5. Step 5: Solve for x
    x = 982,602,472,769.28/879,470.40
  6. Step 6: Final answer
    x = 1,117,266.11

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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.