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Finding the Fourth Proportional to 595.76, 821.88 and 421.34

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Solution

The fourth proportional to 595.76, 821.88 and 421.34 is: 581.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    595.76 : 821.88 = 421.34 : x
  2. Step 2: Convert to fraction form
    595.76/821.88 = 421.34/x
  3. Step 3: Cross multiply
    595.76x = 821.88 × 421.34
  4. Step 4: Simplify right side
    595.76x = 346,290.92
  5. Step 5: Solve for x
    x = 346,290.92/595.76
  6. Step 6: Final answer
    x = 581.26

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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.