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Finding the Fourth Proportional to 628.76, 868.65 and 536.45

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Solution

The fourth proportional to 628.76, 868.65 and 536.45 is: 741.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.76 : 868.65 = 536.45 : x
  2. Step 2: Convert to fraction form
    628.76/868.65 = 536.45/x
  3. Step 3: Cross multiply
    628.76x = 868.65 × 536.45
  4. Step 4: Simplify right side
    628.76x = 465,987.29
  5. Step 5: Solve for x
    x = 465,987.29/628.76
  6. Step 6: Final answer
    x = 741.12

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Find fourth proportional to 314.38, 434.33 and 268.23
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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.