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Finding the Fourth Proportional to 526.76, 726.78 and 316.86

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Solution

The fourth proportional to 526.76, 726.78 and 316.86 is: 437.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.76 : 726.78 = 316.86 : x
  2. Step 2: Convert to fraction form
    526.76/726.78 = 316.86/x
  3. Step 3: Cross multiply
    526.76x = 726.78 × 316.86
  4. Step 4: Simplify right side
    526.76x = 230,287.51
  5. Step 5: Solve for x
    x = 230,287.51/526.76
  6. Step 6: Final answer
    x = 437.18

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Find fourth proportional to 263.38, 363.39 and 158.43
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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.