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Finding the Fourth Proportional to 663,320.16, 915,384.84 and 376,855.95

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Solution

The fourth proportional to 663,320.16, 915,384.84 and 376,855.95 is: 520,062.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,320.16 : 915,384.84 = 376,855.95 : x
  2. Step 2: Convert to fraction form
    663,320.16/915,384.84 = 376,855.95/x
  3. Step 3: Cross multiply
    663,320.16x = 915,384.84 × 376,855.95
  4. Step 4: Simplify right side
    663,320.16x = 344,968,223,493.80
  5. Step 5: Solve for x
    x = 344,968,223,493.80/663,320.16
  6. Step 6: Final answer
    x = 520,062.93

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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.