Home / 1,210,815.63-1,670,548.32-687,440.61

Finding the Fourth Proportional to 1,210,815.63, 1,670,548.32 and 687,440.61

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Solution

The fourth proportional to 1,210,815.63, 1,670,548.32 and 687,440.61 is: 948,453.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,815.63 : 1,670,548.32 = 687,440.61 : x
  2. Step 2: Convert to fraction form
    1,210,815.63/1,670,548.32 = 687,440.61/x
  3. Step 3: Cross multiply
    1,210,815.63x = 1,670,548.32 × 687,440.61
  4. Step 4: Simplify right side
    1,210,815.63x = 1,148,402,756,135.28
  5. Step 5: Solve for x
    x = 1,148,402,756,135.28/1,210,815.63
  6. Step 6: Final answer
    x = 948,453.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.