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Finding the Fourth Proportional to 1,438,310.02, 1,984,915.50 and 784,971.82

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Solution

The fourth proportional to 1,438,310.02, 1,984,915.50 and 784,971.82 is: 1,083,287.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,310.02 : 1,984,915.50 = 784,971.82 : x
  2. Step 2: Convert to fraction form
    1,438,310.02/1,984,915.50 = 784,971.82/x
  3. Step 3: Cross multiply
    1,438,310.02x = 1,984,915.50 × 784,971.82
  4. Step 4: Simplify right side
    1,438,310.02x = 1,558,102,730,562.57
  5. Step 5: Solve for x
    x = 1,558,102,730,562.57/1,438,310.02
  6. Step 6: Final answer
    x = 1,083,287.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.