Home / 813,117.38-1,219,869.84-280,643

Finding the Fourth Proportional to 813,117.38, 1,219,869.84 and 280,643

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Solution

The fourth proportional to 813,117.38, 1,219,869.84 and 280,643 is: 421,031.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,117.38 : 1,219,869.84 = 280,643 : x
  2. Step 2: Convert to fraction form
    813,117.38/1,219,869.84 = 280,643/x
  3. Step 3: Cross multiply
    813,117.38x = 1,219,869.84 × 280,643
  4. Step 4: Simplify right side
    813,117.38x = 342,347,931,507.12
  5. Step 5: Solve for x
    x = 342,347,931,507.12/813,117.38
  6. Step 6: Final answer
    x = 421,031.38

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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.