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Finding the Fourth Proportional to 670.59, 999.30 and 648.57

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Solution

The fourth proportional to 670.59, 999.30 and 648.57 is: 966.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.59 : 999.30 = 648.57 : x
  2. Step 2: Convert to fraction form
    670.59/999.30 = 648.57/x
  3. Step 3: Cross multiply
    670.59x = 999.30 × 648.57
  4. Step 4: Simplify right side
    670.59x = 648,116.00
  5. Step 5: Solve for x
    x = 648,116.00/670.59
  6. Step 6: Final answer
    x = 966.49

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.