Home / 821,478.24-1,231,690.05-342,038.16

Finding the Fourth Proportional to 821,478.24, 1,231,690.05 and 342,038.16

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Solution

The fourth proportional to 821,478.24, 1,231,690.05 and 342,038.16 is: 512,837.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,478.24 : 1,231,690.05 = 342,038.16 : x
  2. Step 2: Convert to fraction form
    821,478.24/1,231,690.05 = 342,038.16/x
  3. Step 3: Cross multiply
    821,478.24x = 1,231,690.05 × 342,038.16
  4. Step 4: Simplify right side
    821,478.24x = 421,284,998,392.31
  5. Step 5: Solve for x
    x = 421,284,998,392.31/821,478.24
  6. Step 6: Final answer
    x = 512,837.68

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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.