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Finding the Fourth Proportional to 1,471.63, 2,030.85 and 947.68

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Solution

The fourth proportional to 1,471.63, 2,030.85 and 947.68 is: 1,307.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.63 : 2,030.85 = 947.68 : x
  2. Step 2: Convert to fraction form
    1,471.63/2,030.85 = 947.68/x
  3. Step 3: Cross multiply
    1,471.63x = 2,030.85 × 947.68
  4. Step 4: Simplify right side
    1,471.63x = 1,924,585.77
  5. Step 5: Solve for x
    x = 1,924,585.77/1,471.63
  6. Step 6: Final answer
    x = 1,307.80

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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.