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Finding the Fourth Proportional to 663,307.76, 915,367.75 and 376,843.57

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Solution

The fourth proportional to 663,307.76, 915,367.75 and 376,843.57 is: 520,045.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,307.76 : 915,367.75 = 376,843.57 : x
  2. Step 2: Convert to fraction form
    663,307.76/915,367.75 = 376,843.57/x
  3. Step 3: Cross multiply
    663,307.76x = 915,367.75 × 376,843.57
  4. Step 4: Simplify right side
    663,307.76x = 344,950,447,542.34
  5. Step 5: Solve for x
    x = 344,950,447,542.34/663,307.76
  6. Step 6: Final answer
    x = 520,045.85

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Double scale
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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.