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Finding the Fourth Proportional to 663,315, 915,399.39 and 376,883.61

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Solution

The fourth proportional to 663,315, 915,399.39 and 376,883.61 is: 520,113.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,315 : 915,399.39 = 376,883.61 : x
  2. Step 2: Convert to fraction form
    663,315/915,399.39 = 376,883.61/x
  3. Step 3: Cross multiply
    663,315x = 915,399.39 × 376,883.61
  4. Step 4: Simplify right side
    663,315x = 344,999,026,695.00
  5. Step 5: Solve for x
    x = 344,999,026,695.00/663,315
  6. Step 6: Final answer
    x = 520,113.41

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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.