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Finding the Fourth Proportional to 525.97, 726.06 and 387.19

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Solution

The fourth proportional to 525.97, 726.06 and 387.19 is: 534.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.97 : 726.06 = 387.19 : x
  2. Step 2: Convert to fraction form
    525.97/726.06 = 387.19/x
  3. Step 3: Cross multiply
    525.97x = 726.06 × 387.19
  4. Step 4: Simplify right side
    525.97x = 281,123.17
  5. Step 5: Solve for x
    x = 281,123.17/525.97
  6. Step 6: Final answer
    x = 534.49

Related Problems

Find fourth proportional to 262.99, 363.03 and 193.60
Half scale
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Double scale
Find fourth proportional to 526.97, 727.44 and 388.19
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.