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Finding the Fourth Proportional to 611,993.60, 915,916.80 and 611,993.60

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Solution

The fourth proportional to 611,993.60, 915,916.80 and 611,993.60 is: 915,916.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,993.60 : 915,916.80 = 611,993.60 : x
  2. Step 2: Convert to fraction form
    611,993.60/915,916.80 = 611,993.60/x
  3. Step 3: Cross multiply
    611,993.60x = 915,916.80 × 611,993.60
  4. Step 4: Simplify right side
    611,993.60x = 560,535,219,732.48
  5. Step 5: Solve for x
    x = 560,535,219,732.48/611,993.60
  6. Step 6: Final answer
    x = 915,916.80

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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.