Home / 811,307.25-1,216,702.08-278,699.85

Finding the Fourth Proportional to 811,307.25, 1,216,702.08 and 278,699.85

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Solution

The fourth proportional to 811,307.25, 1,216,702.08 and 278,699.85 is: 417,960.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,307.25 : 1,216,702.08 = 278,699.85 : x
  2. Step 2: Convert to fraction form
    811,307.25/1,216,702.08 = 278,699.85/x
  3. Step 3: Cross multiply
    811,307.25x = 1,216,702.08 × 278,699.85
  4. Step 4: Simplify right side
    811,307.25x = 339,094,687,190.69
  5. Step 5: Solve for x
    x = 339,094,687,190.69/811,307.25
  6. Step 6: Final answer
    x = 417,960.87

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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.