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Finding the Fourth Proportional to 411,916.80, 618,220.80 and 201,734.40

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Solution

The fourth proportional to 411,916.80, 618,220.80 and 201,734.40 is: 302,770.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,916.80 : 618,220.80 = 201,734.40 : x
  2. Step 2: Convert to fraction form
    411,916.80/618,220.80 = 201,734.40/x
  3. Step 3: Cross multiply
    411,916.80x = 618,220.80 × 201,734.40
  4. Step 4: Simplify right side
    411,916.80x = 124,716,402,155.52
  5. Step 5: Solve for x
    x = 124,716,402,155.52/411,916.80
  6. Step 6: Final answer
    x = 302,770.86

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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.