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Finding the Fourth Proportional to 1,031.84, 1,539.04 and 1,012.40

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Solution

The fourth proportional to 1,031.84, 1,539.04 and 1,012.40 is: 1,510.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.84 : 1,539.04 = 1,012.40 : x
  2. Step 2: Convert to fraction form
    1,031.84/1,539.04 = 1,012.40/x
  3. Step 3: Cross multiply
    1,031.84x = 1,539.04 × 1,012.40
  4. Step 4: Simplify right side
    1,031.84x = 1,558,124.10
  5. Step 5: Solve for x
    x = 1,558,124.10/1,031.84
  6. Step 6: Final answer
    x = 1,510.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.