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Finding the Fourth Proportional to 418,721.60, 623,648.56 and 416,682.56

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Solution

The fourth proportional to 418,721.60, 623,648.56 and 416,682.56 is: 620,611.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,721.60 : 623,648.56 = 416,682.56 : x
  2. Step 2: Convert to fraction form
    418,721.60/623,648.56 = 416,682.56/x
  3. Step 3: Cross multiply
    418,721.60x = 623,648.56 × 416,682.56
  4. Step 4: Simplify right side
    418,721.60x = 259,863,478,521.11
  5. Step 5: Solve for x
    x = 259,863,478,521.11/418,721.60
  6. Step 6: Final answer
    x = 620,611.59

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1.5x scale

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.