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Finding the Fourth Proportional to 1,062.40, 1,590.64 and 541.28

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Solution

The fourth proportional to 1,062.40, 1,590.64 and 541.28 is: 810.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,062.40 : 1,590.64 = 541.28 : x
  2. Step 2: Convert to fraction form
    1,062.40/1,590.64 = 541.28/x
  3. Step 3: Cross multiply
    1,062.40x = 1,590.64 × 541.28
  4. Step 4: Simplify right side
    1,062.40x = 860,981.62
  5. Step 5: Solve for x
    x = 860,981.62/1,062.40
  6. Step 6: Final answer
    x = 810.41

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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.