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Finding the Fourth Proportional to 1,070.63, 1,476.13 and 818.87

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Solution

The fourth proportional to 1,070.63, 1,476.13 and 818.87 is: 1,129.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.63 : 1,476.13 = 818.87 : x
  2. Step 2: Convert to fraction form
    1,070.63/1,476.13 = 818.87/x
  3. Step 3: Cross multiply
    1,070.63x = 1,476.13 × 818.87
  4. Step 4: Simplify right side
    1,070.63x = 1,208,758.98
  5. Step 5: Solve for x
    x = 1,208,758.98/1,070.63
  6. Step 6: Final answer
    x = 1,129.01

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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.