Home / 691,712.80-1,037,569.20-638,568.70

Finding the Fourth Proportional to 691,712.80, 1,037,569.20 and 638,568.70

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Solution

The fourth proportional to 691,712.80, 1,037,569.20 and 638,568.70 is: 957,853.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,712.80 : 1,037,569.20 = 638,568.70 : x
  2. Step 2: Convert to fraction form
    691,712.80/1,037,569.20 = 638,568.70/x
  3. Step 3: Cross multiply
    691,712.80x = 1,037,569.20 × 638,568.70
  4. Step 4: Simplify right side
    691,712.80x = 662,559,215,204.04
  5. Step 5: Solve for x
    x = 662,559,215,204.04/691,712.80
  6. Step 6: Final answer
    x = 957,853.05

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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.