Home / 870,400.86-1,305,972.81-491,605.98

Finding the Fourth Proportional to 870,400.86, 1,305,972.81 and 491,605.98

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Solution

The fourth proportional to 870,400.86, 1,305,972.81 and 491,605.98 is: 737,618.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,400.86 : 1,305,972.81 = 491,605.98 : x
  2. Step 2: Convert to fraction form
    870,400.86/1,305,972.81 = 491,605.98/x
  3. Step 3: Cross multiply
    870,400.86x = 1,305,972.81 × 491,605.98
  4. Step 4: Simplify right side
    870,400.86x = 642,024,043,113.40
  5. Step 5: Solve for x
    x = 642,024,043,113.40/870,400.86
  6. Step 6: Final answer
    x = 737,618.81

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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.