Home / 645,741.45-891,123.66-359,261.73

Finding the Fourth Proportional to 645,741.45, 891,123.66 and 359,261.73

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Solution

The fourth proportional to 645,741.45, 891,123.66 and 359,261.73 is: 495,781.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,741.45 : 891,123.66 = 359,261.73 : x
  2. Step 2: Convert to fraction form
    645,741.45/891,123.66 = 359,261.73/x
  3. Step 3: Cross multiply
    645,741.45x = 891,123.66 × 359,261.73
  4. Step 4: Simplify right side
    645,741.45x = 320,146,627,735.53
  5. Step 5: Solve for x
    x = 320,146,627,735.53/645,741.45
  6. Step 6: Final answer
    x = 495,781.44

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Double scale
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Similar ratio
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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.