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Finding the Fourth Proportional to 935.80, 1,312.55 and 935.80

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Solution

The fourth proportional to 935.80, 1,312.55 and 935.80 is: 1,312.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.80 : 1,312.55 = 935.80 : x
  2. Step 2: Convert to fraction form
    935.80/1,312.55 = 935.80/x
  3. Step 3: Cross multiply
    935.80x = 1,312.55 × 935.80
  4. Step 4: Simplify right side
    935.80x = 1,228,284.29
  5. Step 5: Solve for x
    x = 1,228,284.29/935.80
  6. Step 6: Final answer
    x = 1,312.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.