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Finding the Fourth Proportional to 1,992,916.80, 2,989,083.60 and 572,824.80

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Solution

The fourth proportional to 1,992,916.80, 2,989,083.60 and 572,824.80 is: 859,153.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992,916.80 : 2,989,083.60 = 572,824.80 : x
  2. Step 2: Convert to fraction form
    1,992,916.80/2,989,083.60 = 572,824.80/x
  3. Step 3: Cross multiply
    1,992,916.80x = 2,989,083.60 × 572,824.80
  4. Step 4: Simplify right side
    1,992,916.80x = 1,712,221,215,353.28
  5. Step 5: Solve for x
    x = 1,712,221,215,353.28/1,992,916.80
  6. Step 6: Final answer
    x = 859,153.39

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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.