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Finding the Fourth Proportional to 1,212,654.80, 1,822,918.80 and 860,110.40

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Solution

The fourth proportional to 1,212,654.80, 1,822,918.80 and 860,110.40 is: 1,292,957.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,654.80 : 1,822,918.80 = 860,110.40 : x
  2. Step 2: Convert to fraction form
    1,212,654.80/1,822,918.80 = 860,110.40/x
  3. Step 3: Cross multiply
    1,212,654.80x = 1,822,918.80 × 860,110.40
  4. Step 4: Simplify right side
    1,212,654.80x = 1,567,911,418,235.52
  5. Step 5: Solve for x
    x = 1,567,911,418,235.52/1,212,654.80
  6. Step 6: Final answer
    x = 1,292,957.75

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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.