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Finding the Fourth Proportional to 868,007.80, 1,302,011.70 and 860,134.60

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Solution

The fourth proportional to 868,007.80, 1,302,011.70 and 860,134.60 is: 1,290,201.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,007.80 : 1,302,011.70 = 860,134.60 : x
  2. Step 2: Convert to fraction form
    868,007.80/1,302,011.70 = 860,134.60/x
  3. Step 3: Cross multiply
    868,007.80x = 1,302,011.70 × 860,134.60
  4. Step 4: Simplify right side
    868,007.80x = 1,119,905,312,774.82
  5. Step 5: Solve for x
    x = 1,119,905,312,774.82/868,007.80
  6. Step 6: Final answer
    x = 1,290,201.90

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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.