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Finding the Fourth Proportional to 1,053.47, 1,580.39 and 360.21

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Solution

The fourth proportional to 1,053.47, 1,580.39 and 360.21 is: 540.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.47 : 1,580.39 = 360.21 : x
  2. Step 2: Convert to fraction form
    1,053.47/1,580.39 = 360.21/x
  3. Step 3: Cross multiply
    1,053.47x = 1,580.39 × 360.21
  4. Step 4: Simplify right side
    1,053.47x = 569,273.18
  5. Step 5: Solve for x
    x = 569,273.18/1,053.47
  6. Step 6: Final answer
    x = 540.38

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Double scale
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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.