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Finding the Fourth Proportional to 792.76, 1,095.90 and 628.12

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Solution

The fourth proportional to 792.76, 1,095.90 and 628.12 is: 868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.76 : 1,095.90 = 628.12 : x
  2. Step 2: Convert to fraction form
    792.76/1,095.90 = 628.12/x
  3. Step 3: Cross multiply
    792.76x = 1,095.90 × 628.12
  4. Step 4: Simplify right side
    792.76x = 688,356.71
  5. Step 5: Solve for x
    x = 688,356.71/792.76
  6. Step 6: Final answer
    x = 868.30

Related Problems

Find fourth proportional to 396.38, 547.95 and 314.06
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.