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Finding the Fourth Proportional to 1,246.83, 1,720.33 and 722.76

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Solution

The fourth proportional to 1,246.83, 1,720.33 and 722.76 is: 997.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.83 : 1,720.33 = 722.76 : x
  2. Step 2: Convert to fraction form
    1,246.83/1,720.33 = 722.76/x
  3. Step 3: Cross multiply
    1,246.83x = 1,720.33 × 722.76
  4. Step 4: Simplify right side
    1,246.83x = 1,243,385.71
  5. Step 5: Solve for x
    x = 1,243,385.71/1,246.83
  6. Step 6: Final answer
    x = 997.24

Related Problems

Find fourth proportional to 623.42, 860.17 and 361.38
Half scale
Find fourth proportional to 2,493.66, 3,440.66 and 1,445.52
Double scale
Find fourth proportional to 1,247.83, 1,721.71 and 723.76
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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.