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Finding the Fourth Proportional to 1,580.79, 2,369.56 and 656.85

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Solution

The fourth proportional to 1,580.79, 2,369.56 and 656.85 is: 984.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.79 : 2,369.56 = 656.85 : x
  2. Step 2: Convert to fraction form
    1,580.79/2,369.56 = 656.85/x
  3. Step 3: Cross multiply
    1,580.79x = 2,369.56 × 656.85
  4. Step 4: Simplify right side
    1,580.79x = 1,556,445.49
  5. Step 5: Solve for x
    x = 1,556,445.49/1,580.79
  6. Step 6: Final answer
    x = 984.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.