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Finding the Fourth Proportional to 1,693.64, 2,337.28 and 947.64

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Solution

The fourth proportional to 1,693.64, 2,337.28 and 947.64 is: 1,307.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,693.64 : 2,337.28 = 947.64 : x
  2. Step 2: Convert to fraction form
    1,693.64/2,337.28 = 947.64/x
  3. Step 3: Cross multiply
    1,693.64x = 2,337.28 × 947.64
  4. Step 4: Simplify right side
    1,693.64x = 2,214,900.02
  5. Step 5: Solve for x
    x = 2,214,900.02/1,693.64
  6. Step 6: Final answer
    x = 1,307.77

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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.