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Finding the Fourth Proportional to 526.68, 726.43 and 386.75

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Solution

The fourth proportional to 526.68, 726.43 and 386.75 is: 533.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.68 : 726.43 = 386.75 : x
  2. Step 2: Convert to fraction form
    526.68/726.43 = 386.75/x
  3. Step 3: Cross multiply
    526.68x = 726.43 × 386.75
  4. Step 4: Simplify right side
    526.68x = 280,946.80
  5. Step 5: Solve for x
    x = 280,946.80/526.68
  6. Step 6: Final answer
    x = 533.43

Related Problems

Find fourth proportional to 263.34, 363.22 and 193.38
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Double scale
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Similar ratio
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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.