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Finding the Fourth Proportional to 418,872.53, 623,570.95 and 416,381.38

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Solution

The fourth proportional to 418,872.53, 623,570.95 and 416,381.38 is: 619,862.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,872.53 : 623,570.95 = 416,381.38 : x
  2. Step 2: Convert to fraction form
    418,872.53/623,570.95 = 416,381.38/x
  3. Step 3: Cross multiply
    418,872.53x = 623,570.95 × 416,381.38
  4. Step 4: Simplify right side
    418,872.53x = 259,643,329,571.06
  5. Step 5: Solve for x
    x = 259,643,329,571.06/418,872.53
  6. Step 6: Final answer
    x = 619,862.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.