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Finding the Fourth Proportional to 758.76, 1,045.71 and 522.72

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Solution

The fourth proportional to 758.76, 1,045.71 and 522.72 is: 720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.76 : 1,045.71 = 522.72 : x
  2. Step 2: Convert to fraction form
    758.76/1,045.71 = 522.72/x
  3. Step 3: Cross multiply
    758.76x = 1,045.71 × 522.72
  4. Step 4: Simplify right side
    758.76x = 546,613.53
  5. Step 5: Solve for x
    x = 546,613.53/758.76
  6. Step 6: Final answer
    x = 720.40

Related Problems

Find fourth proportional to 379.38, 522.86 and 261.36
Half scale
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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.