Home / 289,277.20-434,207.40-139,637.80

Finding the Fourth Proportional to 289,277.20, 434,207.40 and 139,637.80

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Solution

The fourth proportional to 289,277.20, 434,207.40 and 139,637.80 is: 209,597.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,277.20 : 434,207.40 = 139,637.80 : x
  2. Step 2: Convert to fraction form
    289,277.20/434,207.40 = 139,637.80/x
  3. Step 3: Cross multiply
    289,277.20x = 434,207.40 × 139,637.80
  4. Step 4: Simplify right side
    289,277.20x = 60,631,766,079.72
  5. Step 5: Solve for x
    x = 60,631,766,079.72/289,277.20
  6. Step 6: Final answer
    x = 209,597.46

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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.