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Finding the Fourth Proportional to 1,119.32, 1,545.99 and 971.90

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Solution

The fourth proportional to 1,119.32, 1,545.99 and 971.90 is: 1,342.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.32 : 1,545.99 = 971.90 : x
  2. Step 2: Convert to fraction form
    1,119.32/1,545.99 = 971.90/x
  3. Step 3: Cross multiply
    1,119.32x = 1,545.99 × 971.90
  4. Step 4: Simplify right side
    1,119.32x = 1,502,547.68
  5. Step 5: Solve for x
    x = 1,502,547.68/1,119.32
  6. Step 6: Final answer
    x = 1,342.38

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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.