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Finding the Fourth Proportional to 917,078.60, 1,375,617.90 and 854,870.60

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Solution

The fourth proportional to 917,078.60, 1,375,617.90 and 854,870.60 is: 1,282,305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,078.60 : 1,375,617.90 = 854,870.60 : x
  2. Step 2: Convert to fraction form
    917,078.60/1,375,617.90 = 854,870.60/x
  3. Step 3: Cross multiply
    917,078.60x = 1,375,617.90 × 854,870.60
  4. Step 4: Simplify right side
    917,078.60x = 1,175,975,299,543.74
  5. Step 5: Solve for x
    x = 1,175,975,299,543.74/917,078.60
  6. Step 6: Final answer
    x = 1,282,305.90

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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.