Home / 1,138,432.40-1,707,648.60-428,619.68

Finding the Fourth Proportional to 1,138,432.40, 1,707,648.60 and 428,619.68

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Solution

The fourth proportional to 1,138,432.40, 1,707,648.60 and 428,619.68 is: 642,929.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,432.40 : 1,707,648.60 = 428,619.68 : x
  2. Step 2: Convert to fraction form
    1,138,432.40/1,707,648.60 = 428,619.68/x
  3. Step 3: Cross multiply
    1,138,432.40x = 1,707,648.60 × 428,619.68
  4. Step 4: Simplify right side
    1,138,432.40x = 731,931,796,484.45
  5. Step 5: Solve for x
    x = 731,931,796,484.45/1,138,432.40
  6. Step 6: Final answer
    x = 642,929.52

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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.