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Finding the Fourth Proportional to 432,813.40, 649,220.10 and 426,592.60

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Solution

The fourth proportional to 432,813.40, 649,220.10 and 426,592.60 is: 639,888.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,813.40 : 649,220.10 = 426,592.60 : x
  2. Step 2: Convert to fraction form
    432,813.40/649,220.10 = 426,592.60/x
  3. Step 3: Cross multiply
    432,813.40x = 649,220.10 × 426,592.60
  4. Step 4: Simplify right side
    432,813.40x = 276,952,490,431.26
  5. Step 5: Solve for x
    x = 276,952,490,431.26/432,813.40
  6. Step 6: Final answer
    x = 639,888.90

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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.