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Finding the Fourth Proportional to 1,265,724.63, 1,899,899.55 and 847,920.15

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Solution

The fourth proportional to 1,265,724.63, 1,899,899.55 and 847,920.15 is: 1,272,759.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265,724.63 : 1,899,899.55 = 847,920.15 : x
  2. Step 2: Convert to fraction form
    1,265,724.63/1,899,899.55 = 847,920.15/x
  3. Step 3: Cross multiply
    1,265,724.63x = 1,899,899.55 × 847,920.15
  4. Step 4: Simplify right side
    1,265,724.63x = 1,610,963,111,420.93
  5. Step 5: Solve for x
    x = 1,610,963,111,420.93/1,265,724.63
  6. Step 6: Final answer
    x = 1,272,759.55

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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.