Home / 813,913.20-1,123,100.10-491,646.60

Finding the Fourth Proportional to 813,913.20, 1,123,100.10 and 491,646.60

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Solution

The fourth proportional to 813,913.20, 1,123,100.10 and 491,646.60 is: 678,411.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,913.20 : 1,123,100.10 = 491,646.60 : x
  2. Step 2: Convert to fraction form
    813,913.20/1,123,100.10 = 491,646.60/x
  3. Step 3: Cross multiply
    813,913.20x = 1,123,100.10 × 491,646.60
  4. Step 4: Simplify right side
    813,913.20x = 552,168,345,624.66
  5. Step 5: Solve for x
    x = 552,168,345,624.66/813,913.20
  6. Step 6: Final answer
    x = 678,411.83

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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.