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Finding the Fourth Proportional to 1,354.14, 1,870.12 and 935.58

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Solution

The fourth proportional to 1,354.14, 1,870.12 and 935.58 is: 1,292.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.14 : 1,870.12 = 935.58 : x
  2. Step 2: Convert to fraction form
    1,354.14/1,870.12 = 935.58/x
  3. Step 3: Cross multiply
    1,354.14x = 1,870.12 × 935.58
  4. Step 4: Simplify right side
    1,354.14x = 1,749,646.87
  5. Step 5: Solve for x
    x = 1,749,646.87/1,354.14
  6. Step 6: Final answer
    x = 1,292.07

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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.