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Finding the Fourth Proportional to 885.80, 1,222.49 and 512.77

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Solution

The fourth proportional to 885.80, 1,222.49 and 512.77 is: 707.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.80 : 1,222.49 = 512.77 : x
  2. Step 2: Convert to fraction form
    885.80/1,222.49 = 512.77/x
  3. Step 3: Cross multiply
    885.80x = 1,222.49 × 512.77
  4. Step 4: Simplify right side
    885.80x = 626,854.42
  5. Step 5: Solve for x
    x = 626,854.42/885.80
  6. Step 6: Final answer
    x = 707.67

Related Problems

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Half scale
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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.