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Finding the Fourth Proportional to 1,865,420.15, 2,574,397.15 and 1,130,438.78

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Solution

The fourth proportional to 1,865,420.15, 2,574,397.15 and 1,130,438.78 is: 1,560,076.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865,420.15 : 2,574,397.15 = 1,130,438.78 : x
  2. Step 2: Convert to fraction form
    1,865,420.15/2,574,397.15 = 1,130,438.78/x
  3. Step 3: Cross multiply
    1,865,420.15x = 2,574,397.15 × 1,130,438.78
  4. Step 4: Simplify right side
    1,865,420.15x = 2,910,198,373,481.48
  5. Step 5: Solve for x
    x = 2,910,198,373,481.48/1,865,420.15
  6. Step 6: Final answer
    x = 1,560,076.63

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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.