Home / 430,131.20-645,328.02-219,916.76

Finding the Fourth Proportional to 430,131.20, 645,328.02 and 219,916.76

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Solution

The fourth proportional to 430,131.20, 645,328.02 and 219,916.76 is: 329,942.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,131.20 : 645,328.02 = 219,916.76 : x
  2. Step 2: Convert to fraction form
    430,131.20/645,328.02 = 219,916.76/x
  3. Step 3: Cross multiply
    430,131.20x = 645,328.02 × 219,916.76
  4. Step 4: Simplify right side
    430,131.20x = 141,918,447,295.62
  5. Step 5: Solve for x
    x = 141,918,447,295.62/430,131.20
  6. Step 6: Final answer
    x = 329,942.23

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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.