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Finding the Fourth Proportional to 1,292.54, 1,781.60 and 1,012.32

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Solution

The fourth proportional to 1,292.54, 1,781.60 and 1,012.32 is: 1,395.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.54 : 1,781.60 = 1,012.32 : x
  2. Step 2: Convert to fraction form
    1,292.54/1,781.60 = 1,012.32/x
  3. Step 3: Cross multiply
    1,292.54x = 1,781.60 × 1,012.32
  4. Step 4: Simplify right side
    1,292.54x = 1,803,549.31
  5. Step 5: Solve for x
    x = 1,803,549.31/1,292.54
  6. Step 6: Final answer
    x = 1,395.35

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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.