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Finding the Fourth Proportional to 1,070.46, 1,480.05 and 947.34

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Solution

The fourth proportional to 1,070.46, 1,480.05 and 947.34 is: 1,309.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.46 : 1,480.05 = 947.34 : x
  2. Step 2: Convert to fraction form
    1,070.46/1,480.05 = 947.34/x
  3. Step 3: Cross multiply
    1,070.46x = 1,480.05 × 947.34
  4. Step 4: Simplify right side
    1,070.46x = 1,402,110.57
  5. Step 5: Solve for x
    x = 1,402,110.57/1,070.46
  6. Step 6: Final answer
    x = 1,309.82

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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.