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Finding the Fourth Proportional to 651,649.80, 977,474.70 and 440,142.60

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Solution

The fourth proportional to 651,649.80, 977,474.70 and 440,142.60 is: 660,213.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,649.80 : 977,474.70 = 440,142.60 : x
  2. Step 2: Convert to fraction form
    651,649.80/977,474.70 = 440,142.60/x
  3. Step 3: Cross multiply
    651,649.80x = 977,474.70 × 440,142.60
  4. Step 4: Simplify right side
    651,649.80x = 430,228,255,892.22
  5. Step 5: Solve for x
    x = 430,228,255,892.22/651,649.80
  6. Step 6: Final answer
    x = 660,213.90

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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.