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Finding the Fourth Proportional to 953.60, 1,315.76 and 580.80

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Solution

The fourth proportional to 953.60, 1,315.76 and 580.80 is: 801.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.60 : 1,315.76 = 580.80 : x
  2. Step 2: Convert to fraction form
    953.60/1,315.76 = 580.80/x
  3. Step 3: Cross multiply
    953.60x = 1,315.76 × 580.80
  4. Step 4: Simplify right side
    953.60x = 764,193.41
  5. Step 5: Solve for x
    x = 764,193.41/953.60
  6. Step 6: Final answer
    x = 801.38

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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.