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Finding the Fourth Proportional to 705.72, 973.80 and 508.89

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Solution

The fourth proportional to 705.72, 973.80 and 508.89 is: 702.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.72 : 973.80 = 508.89 : x
  2. Step 2: Convert to fraction form
    705.72/973.80 = 508.89/x
  3. Step 3: Cross multiply
    705.72x = 973.80 × 508.89
  4. Step 4: Simplify right side
    705.72x = 495,557.08
  5. Step 5: Solve for x
    x = 495,557.08/705.72
  6. Step 6: Final answer
    x = 702.20

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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.