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Finding the Fourth Proportional to 1,655.38, 2,284.46 and 947.38

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Solution

The fourth proportional to 1,655.38, 2,284.46 and 947.38 is: 1,307.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,655.38 : 2,284.46 = 947.38 : x
  2. Step 2: Convert to fraction form
    1,655.38/2,284.46 = 947.38/x
  3. Step 3: Cross multiply
    1,655.38x = 2,284.46 × 947.38
  4. Step 4: Simplify right side
    1,655.38x = 2,164,251.71
  5. Step 5: Solve for x
    x = 2,164,251.71/1,655.38
  6. Step 6: Final answer
    x = 1,307.40

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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.