Home / 289,916.80-434,875.20-140,228.80

Finding the Fourth Proportional to 289,916.80, 434,875.20 and 140,228.80

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Solution

The fourth proportional to 289,916.80, 434,875.20 and 140,228.80 is: 210,343.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,916.80 : 434,875.20 = 140,228.80 : x
  2. Step 2: Convert to fraction form
    289,916.80/434,875.20 = 140,228.80/x
  3. Step 3: Cross multiply
    289,916.80x = 434,875.20 × 140,228.80
  4. Step 4: Simplify right side
    289,916.80x = 60,982,027,445.76
  5. Step 5: Solve for x
    x = 60,982,027,445.76/289,916.80
  6. Step 6: Final answer
    x = 210,343.20

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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.