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Finding the Fourth Proportional to 610.40, 841.38 and 479.18

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Solution

The fourth proportional to 610.40, 841.38 and 479.18 is: 660.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.40 : 841.38 = 479.18 : x
  2. Step 2: Convert to fraction form
    610.40/841.38 = 479.18/x
  3. Step 3: Cross multiply
    610.40x = 841.38 × 479.18
  4. Step 4: Simplify right side
    610.40x = 403,172.47
  5. Step 5: Solve for x
    x = 403,172.47/610.40
  6. Step 6: Final answer
    x = 660.51

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1.5x scale

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.