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Finding the Fourth Proportional to 521.84, 719.91 and 300.76

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Solution

The fourth proportional to 521.84, 719.91 and 300.76 is: 414.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.84 : 719.91 = 300.76 : x
  2. Step 2: Convert to fraction form
    521.84/719.91 = 300.76/x
  3. Step 3: Cross multiply
    521.84x = 719.91 × 300.76
  4. Step 4: Simplify right side
    521.84x = 216,518.33
  5. Step 5: Solve for x
    x = 216,518.33/521.84
  6. Step 6: Final answer
    x = 414.92

Related Problems

Find fourth proportional to 260.92, 359.96 and 150.38
Half scale
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Double scale
Find fourth proportional to 522.84, 721.29 and 301.76
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.