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Finding the Fourth Proportional to 786.70, 1,085.10 and 524.68

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Solution

The fourth proportional to 786.70, 1,085.10 and 524.68 is: 723.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.70 : 1,085.10 = 524.68 : x
  2. Step 2: Convert to fraction form
    786.70/1,085.10 = 524.68/x
  3. Step 3: Cross multiply
    786.70x = 1,085.10 × 524.68
  4. Step 4: Simplify right side
    786.70x = 569,330.27
  5. Step 5: Solve for x
    x = 569,330.27/786.70
  6. Step 6: Final answer
    x = 723.69

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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.