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Finding the Fourth Proportional to 535.07, 801.60 and 260.78

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Solution

The fourth proportional to 535.07, 801.60 and 260.78 is: 390.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.07 : 801.60 = 260.78 : x
  2. Step 2: Convert to fraction form
    535.07/801.60 = 260.78/x
  3. Step 3: Cross multiply
    535.07x = 801.60 × 260.78
  4. Step 4: Simplify right side
    535.07x = 209,041.25
  5. Step 5: Solve for x
    x = 209,041.25/535.07
  6. Step 6: Final answer
    x = 390.68

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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.