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Finding the Fourth Proportional to 1,394.55, 1,925.12 and 897.47

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Solution

The fourth proportional to 1,394.55, 1,925.12 and 897.47 is: 1,238.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.55 : 1,925.12 = 897.47 : x
  2. Step 2: Convert to fraction form
    1,394.55/1,925.12 = 897.47/x
  3. Step 3: Cross multiply
    1,394.55x = 1,925.12 × 897.47
  4. Step 4: Simplify right side
    1,394.55x = 1,727,723.33
  5. Step 5: Solve for x
    x = 1,727,723.33/1,394.55
  6. Step 6: Final answer
    x = 1,238.91

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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.