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Finding the Fourth Proportional to 425,516.40, 637,432.20 and 275,860.80

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Solution

The fourth proportional to 425,516.40, 637,432.20 and 275,860.80 is: 413,245.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,516.40 : 637,432.20 = 275,860.80 : x
  2. Step 2: Convert to fraction form
    425,516.40/637,432.20 = 275,860.80/x
  3. Step 3: Cross multiply
    425,516.40x = 637,432.20 × 275,860.80
  4. Step 4: Simplify right side
    425,516.40x = 175,842,556,637.76
  5. Step 5: Solve for x
    x = 175,842,556,637.76/425,516.40
  6. Step 6: Final answer
    x = 413,245.08

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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.