Home / 1,198,403.40-1,799,678.70-638,531.40

Finding the Fourth Proportional to 1,198,403.40, 1,799,678.70 and 638,531.40

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Solution

The fourth proportional to 1,198,403.40, 1,799,678.70 and 638,531.40 is: 958,901.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198,403.40 : 1,799,678.70 = 638,531.40 : x
  2. Step 2: Convert to fraction form
    1,198,403.40/1,799,678.70 = 638,531.40/x
  3. Step 3: Cross multiply
    1,198,403.40x = 1,799,678.70 × 638,531.40
  4. Step 4: Simplify right side
    1,198,403.40x = 1,149,151,359,861.18
  5. Step 5: Solve for x
    x = 1,149,151,359,861.18/1,198,403.40
  6. Step 6: Final answer
    x = 958,901.95

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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.