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Finding the Fourth Proportional to 510.41, 703.51 and 390.73

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Solution

The fourth proportional to 510.41, 703.51 and 390.73 is: 538.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.41 : 703.51 = 390.73 : x
  2. Step 2: Convert to fraction form
    510.41/703.51 = 390.73/x
  3. Step 3: Cross multiply
    510.41x = 703.51 × 390.73
  4. Step 4: Simplify right side
    510.41x = 274,882.36
  5. Step 5: Solve for x
    x = 274,882.36/510.41
  6. Step 6: Final answer
    x = 538.55

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Double scale
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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.