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Finding the Fourth Proportional to 491,514.88, 678,154.80 and 276,642.40

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Solution

The fourth proportional to 491,514.88, 678,154.80 and 276,642.40 is: 381,690.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,514.88 : 678,154.80 = 276,642.40 : x
  2. Step 2: Convert to fraction form
    491,514.88/678,154.80 = 276,642.40/x
  3. Step 3: Cross multiply
    491,514.88x = 678,154.80 × 276,642.40
  4. Step 4: Simplify right side
    491,514.88x = 187,606,371,443.52
  5. Step 5: Solve for x
    x = 187,606,371,443.52/491,514.88
  6. Step 6: Final answer
    x = 381,690.12

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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.