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Finding the Fourth Proportional to 1,059.70, 1,480.70 and 1,059.70

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Solution

The fourth proportional to 1,059.70, 1,480.70 and 1,059.70 is: 1,480.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.70 : 1,480.70 = 1,059.70 : x
  2. Step 2: Convert to fraction form
    1,059.70/1,480.70 = 1,059.70/x
  3. Step 3: Cross multiply
    1,059.70x = 1,480.70 × 1,059.70
  4. Step 4: Simplify right side
    1,059.70x = 1,569,097.79
  5. Step 5: Solve for x
    x = 1,569,097.79/1,059.70
  6. Step 6: Final answer
    x = 1,480.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.