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Finding the Fourth Proportional to 860,559.84, 1,290,838.41 and 261,518.40

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Solution

The fourth proportional to 860,559.84, 1,290,838.41 and 261,518.40 is: 392,277.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,559.84 : 1,290,838.41 = 261,518.40 : x
  2. Step 2: Convert to fraction form
    860,559.84/1,290,838.41 = 261,518.40/x
  3. Step 3: Cross multiply
    860,559.84x = 1,290,838.41 × 261,518.40
  4. Step 4: Simplify right side
    860,559.84x = 337,577,995,641.74
  5. Step 5: Solve for x
    x = 337,577,995,641.74/860,559.84
  6. Step 6: Final answer
    x = 392,277.19

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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.