Home / 813,916.52-1,220,874.80-315,280.52

Finding the Fourth Proportional to 813,916.52, 1,220,874.80 and 315,280.52

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Solution

The fourth proportional to 813,916.52, 1,220,874.80 and 315,280.52 is: 472,920.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,916.52 : 1,220,874.80 = 315,280.52 : x
  2. Step 2: Convert to fraction form
    813,916.52/1,220,874.80 = 315,280.52/x
  3. Step 3: Cross multiply
    813,916.52x = 1,220,874.80 × 315,280.52
  4. Step 4: Simplify right side
    813,916.52x = 384,918,041,798.90
  5. Step 5: Solve for x
    x = 384,918,041,798.90/813,916.52
  6. Step 6: Final answer
    x = 472,920.79

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1.5x scale

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.