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Finding the Fourth Proportional to 1,189.08, 1,640.30 and 746.76

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Solution

The fourth proportional to 1,189.08, 1,640.30 and 746.76 is: 1,030.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.08 : 1,640.30 = 746.76 : x
  2. Step 2: Convert to fraction form
    1,189.08/1,640.30 = 746.76/x
  3. Step 3: Cross multiply
    1,189.08x = 1,640.30 × 746.76
  4. Step 4: Simplify right side
    1,189.08x = 1,224,910.43
  5. Step 5: Solve for x
    x = 1,224,910.43/1,189.08
  6. Step 6: Final answer
    x = 1,030.13

Related Problems

Find fourth proportional to 594.54, 820.15 and 373.38
Half scale
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Double scale
Find fourth proportional to 1,190.08, 1,641.68 and 747.76
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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.