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Finding the Fourth Proportional to 425,968.80, 637,724.40 and 260,080.80

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Solution

The fourth proportional to 425,968.80, 637,724.40 and 260,080.80 is: 389,370.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,968.80 : 637,724.40 = 260,080.80 : x
  2. Step 2: Convert to fraction form
    425,968.80/637,724.40 = 260,080.80/x
  3. Step 3: Cross multiply
    425,968.80x = 637,724.40 × 260,080.80
  4. Step 4: Simplify right side
    425,968.80x = 165,859,872,131.52
  5. Step 5: Solve for x
    x = 165,859,872,131.52/425,968.80
  6. Step 6: Final answer
    x = 389,370.94

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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.