Home / 783,085.20-1,172,878.20-643,117.20

Finding the Fourth Proportional to 783,085.20, 1,172,878.20 and 643,117.20

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Solution

The fourth proportional to 783,085.20, 1,172,878.20 and 643,117.20 is: 963,238.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,085.20 : 1,172,878.20 = 643,117.20 : x
  2. Step 2: Convert to fraction form
    783,085.20/1,172,878.20 = 643,117.20/x
  3. Step 3: Cross multiply
    783,085.20x = 1,172,878.20 × 643,117.20
  4. Step 4: Simplify right side
    783,085.20x = 754,298,143,925.04
  5. Step 5: Solve for x
    x = 754,298,143,925.04/783,085.20
  6. Step 6: Final answer
    x = 963,238.92

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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.