Home / 813,820.86-1,123,306.65-491,476.50

Finding the Fourth Proportional to 813,820.86, 1,123,306.65 and 491,476.50

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Solution

The fourth proportional to 813,820.86, 1,123,306.65 and 491,476.50 is: 678,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,820.86 : 1,123,306.65 = 491,476.50 : x
  2. Step 2: Convert to fraction form
    813,820.86/1,123,306.65 = 491,476.50/x
  3. Step 3: Cross multiply
    813,820.86x = 1,123,306.65 × 491,476.50
  4. Step 4: Simplify right side
    813,820.86x = 552,078,820,768.73
  5. Step 5: Solve for x
    x = 552,078,820,768.73/813,820.86
  6. Step 6: Final answer
    x = 678,378.80

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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.