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Finding the Fourth Proportional to 840.04, 1,156.52 and 662.68

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Solution

The fourth proportional to 840.04, 1,156.52 and 662.68 is: 912.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.04 : 1,156.52 = 662.68 : x
  2. Step 2: Convert to fraction form
    840.04/1,156.52 = 662.68/x
  3. Step 3: Cross multiply
    840.04x = 1,156.52 × 662.68
  4. Step 4: Simplify right side
    840.04x = 766,402.67
  5. Step 5: Solve for x
    x = 766,402.67/840.04
  6. Step 6: Final answer
    x = 912.34

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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.