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Finding the Fourth Proportional to 426,075.60, 639,113.40 and 269,000.40

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Solution

The fourth proportional to 426,075.60, 639,113.40 and 269,000.40 is: 403,500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,075.60 : 639,113.40 = 269,000.40 : x
  2. Step 2: Convert to fraction form
    426,075.60/639,113.40 = 269,000.40/x
  3. Step 3: Cross multiply
    426,075.60x = 639,113.40 × 269,000.40
  4. Step 4: Simplify right side
    426,075.60x = 171,921,760,245.36
  5. Step 5: Solve for x
    x = 171,921,760,245.36/426,075.60
  6. Step 6: Final answer
    x = 403,500.60

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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.