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Finding the Fourth Proportional to 711.08, 978.87 and 616.52

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Solution

The fourth proportional to 711.08, 978.87 and 616.52 is: 848.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.08 : 978.87 = 616.52 : x
  2. Step 2: Convert to fraction form
    711.08/978.87 = 616.52/x
  3. Step 3: Cross multiply
    711.08x = 978.87 × 616.52
  4. Step 4: Simplify right side
    711.08x = 603,492.93
  5. Step 5: Solve for x
    x = 603,492.93/711.08
  6. Step 6: Final answer
    x = 848.70

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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.