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Finding the Fourth Proportional to 612,170.70, 918,256.05 and 443,334.30

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Solution

The fourth proportional to 612,170.70, 918,256.05 and 443,334.30 is: 665,001.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,170.70 : 918,256.05 = 443,334.30 : x
  2. Step 2: Convert to fraction form
    612,170.70/918,256.05 = 443,334.30/x
  3. Step 3: Cross multiply
    612,170.70x = 918,256.05 × 443,334.30
  4. Step 4: Simplify right side
    612,170.70x = 407,094,403,147.52
  5. Step 5: Solve for x
    x = 407,094,403,147.52/612,170.70
  6. Step 6: Final answer
    x = 665,001.45

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.