Home / 917,999.70-1,376,999.55-911,778.90

Finding the Fourth Proportional to 917,999.70, 1,376,999.55 and 911,778.90

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Solution

The fourth proportional to 917,999.70, 1,376,999.55 and 911,778.90 is: 1,367,668.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,999.70 : 1,376,999.55 = 911,778.90 : x
  2. Step 2: Convert to fraction form
    917,999.70/1,376,999.55 = 911,778.90/x
  3. Step 3: Cross multiply
    917,999.70x = 1,376,999.55 × 911,778.90
  4. Step 4: Simplify right side
    917,999.70x = 1,255,519,134,999.50
  5. Step 5: Solve for x
    x = 1,255,519,134,999.50/917,999.70
  6. Step 6: Final answer
    x = 1,367,668.35

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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.