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Finding the Fourth Proportional to 885.69, 1,222.46 and 512.61

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Solution

The fourth proportional to 885.69, 1,222.46 and 512.61 is: 707.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.69 : 1,222.46 = 512.61 : x
  2. Step 2: Convert to fraction form
    885.69/1,222.46 = 512.61/x
  3. Step 3: Cross multiply
    885.69x = 1,222.46 × 512.61
  4. Step 4: Simplify right side
    885.69x = 626,646.50
  5. Step 5: Solve for x
    x = 626,646.50/885.69
  6. Step 6: Final answer
    x = 707.52

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Double scale
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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.