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Finding the Fourth Proportional to 1,237,435.84, 1,707,633 and 721,156.80

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Solution

The fourth proportional to 1,237,435.84, 1,707,633 and 721,156.80 is: 995,179.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237,435.84 : 1,707,633 = 721,156.80 : x
  2. Step 2: Convert to fraction form
    1,237,435.84/1,707,633 = 721,156.80/x
  3. Step 3: Cross multiply
    1,237,435.84x = 1,707,633 × 721,156.80
  4. Step 4: Simplify right side
    1,237,435.84x = 1,231,471,149,854.40
  5. Step 5: Solve for x
    x = 1,231,471,149,854.40/1,237,435.84
  6. Step 6: Final answer
    x = 995,179.80

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Double scale
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1.5x scale

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.