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Finding the Fourth Proportional to 1,124.69, 1,551.35 and 1,045.51

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Solution

The fourth proportional to 1,124.69, 1,551.35 and 1,045.51 is: 1,442.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.69 : 1,551.35 = 1,045.51 : x
  2. Step 2: Convert to fraction form
    1,124.69/1,551.35 = 1,045.51/x
  3. Step 3: Cross multiply
    1,124.69x = 1,551.35 × 1,045.51
  4. Step 4: Simplify right side
    1,124.69x = 1,621,950.67
  5. Step 5: Solve for x
    x = 1,621,950.67/1,124.69
  6. Step 6: Final answer
    x = 1,442.14

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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.