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Finding the Fourth Proportional to 1,162,281.87, 1,603,978.61 and 638,986.08

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Solution

The fourth proportional to 1,162,281.87, 1,603,978.61 and 638,986.08 is: 881,817.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162,281.87 : 1,603,978.61 = 638,986.08 : x
  2. Step 2: Convert to fraction form
    1,162,281.87/1,603,978.61 = 638,986.08/x
  3. Step 3: Cross multiply
    1,162,281.87x = 1,603,978.61 × 638,986.08
  4. Step 4: Simplify right side
    1,162,281.87x = 1,024,919,997,594.10
  5. Step 5: Solve for x
    x = 1,024,919,997,594.10/1,162,281.87
  6. Step 6: Final answer
    x = 881,817.08

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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.