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Finding the Fourth Proportional to 610.04, 841.78 and 388.90

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Solution

The fourth proportional to 610.04, 841.78 and 388.90 is: 536.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.04 : 841.78 = 388.90 : x
  2. Step 2: Convert to fraction form
    610.04/841.78 = 388.90/x
  3. Step 3: Cross multiply
    610.04x = 841.78 × 388.90
  4. Step 4: Simplify right side
    610.04x = 327,368.24
  5. Step 5: Solve for x
    x = 327,368.24/610.04
  6. Step 6: Final answer
    x = 536.63

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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.