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Finding the Fourth Proportional to 438,605.82, 605,376 and 285,373.68

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Solution

The fourth proportional to 438,605.82, 605,376 and 285,373.68 is: 393,880.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,605.82 : 605,376 = 285,373.68 : x
  2. Step 2: Convert to fraction form
    438,605.82/605,376 = 285,373.68/x
  3. Step 3: Cross multiply
    438,605.82x = 605,376 × 285,373.68
  4. Step 4: Simplify right side
    438,605.82x = 172,758,376,903.68
  5. Step 5: Solve for x
    x = 172,758,376,903.68/438,605.82
  6. Step 6: Final answer
    x = 393,880.72

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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.