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Finding the Fourth Proportional to 886,920.40, 1,330,708.65 and 287,901.10

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Solution

The fourth proportional to 886,920.40, 1,330,708.65 and 287,901.10 is: 431,958.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,920.40 : 1,330,708.65 = 287,901.10 : x
  2. Step 2: Convert to fraction form
    886,920.40/1,330,708.65 = 287,901.10/x
  3. Step 3: Cross multiply
    886,920.40x = 1,330,708.65 × 287,901.10
  4. Step 4: Simplify right side
    886,920.40x = 383,112,484,114.52
  5. Step 5: Solve for x
    x = 383,112,484,114.52/886,920.40
  6. Step 6: Final answer
    x = 431,958.14

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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.