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Finding the Fourth Proportional to 710.72, 979.44 and 503.36

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Solution

The fourth proportional to 710.72, 979.44 and 503.36 is: 693.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.72 : 979.44 = 503.36 : x
  2. Step 2: Convert to fraction form
    710.72/979.44 = 503.36/x
  3. Step 3: Cross multiply
    710.72x = 979.44 × 503.36
  4. Step 4: Simplify right side
    710.72x = 493,010.92
  5. Step 5: Solve for x
    x = 493,010.92/710.72
  6. Step 6: Final answer
    x = 693.68

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1.5x scale

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.