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Finding the Fourth Proportional to 663,314.16, 915,376.56 and 376,849.98

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Solution

The fourth proportional to 663,314.16, 915,376.56 and 376,849.98 is: 520,054.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,314.16 : 915,376.56 = 376,849.98 : x
  2. Step 2: Convert to fraction form
    663,314.16/915,376.56 = 376,849.98/x
  3. Step 3: Cross multiply
    663,314.16x = 915,376.56 × 376,849.98
  4. Step 4: Simplify right side
    663,314.16x = 344,959,638,328.47
  5. Step 5: Solve for x
    x = 344,959,638,328.47/663,314.16
  6. Step 6: Final answer
    x = 520,054.69

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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.