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Finding the Fourth Proportional to 753.55, 1,130.60 and 260

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Solution

The fourth proportional to 753.55, 1,130.60 and 260 is: 390.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.55 : 1,130.60 = 260 : x
  2. Step 2: Convert to fraction form
    753.55/1,130.60 = 260/x
  3. Step 3: Cross multiply
    753.55x = 1,130.60 × 260
  4. Step 4: Simplify right side
    753.55x = 293,954.70
  5. Step 5: Solve for x
    x = 293,954.70/753.55
  6. Step 6: Final answer
    x = 390.10

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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.