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Finding the Fourth Proportional to 1,317,679.10, 1,972,582.05 and 784,925.90

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Solution

The fourth proportional to 1,317,679.10, 1,972,582.05 and 784,925.90 is: 1,175,043.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,679.10 : 1,972,582.05 = 784,925.90 : x
  2. Step 2: Convert to fraction form
    1,317,679.10/1,972,582.05 = 784,925.90/x
  3. Step 3: Cross multiply
    1,317,679.10x = 1,972,582.05 × 784,925.90
  4. Step 4: Simplify right side
    1,317,679.10x = 1,548,330,740,920.10
  5. Step 5: Solve for x
    x = 1,548,330,740,920.10/1,317,679.10
  6. Step 6: Final answer
    x = 1,175,043.86

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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.