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Finding the Fourth Proportional to 521.19, 718.70 and 346.23

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Solution

The fourth proportional to 521.19, 718.70 and 346.23 is: 477.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.19 : 718.70 = 346.23 : x
  2. Step 2: Convert to fraction form
    521.19/718.70 = 346.23/x
  3. Step 3: Cross multiply
    521.19x = 718.70 × 346.23
  4. Step 4: Simplify right side
    521.19x = 248,833.77
  5. Step 5: Solve for x
    x = 248,833.77/521.19
  6. Step 6: Final answer
    x = 477.43

Related Problems

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Half scale
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Double scale
Find fourth proportional to 522.19, 720.07 and 347.23
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.