Home / 431,569,339.10-646,928,855.85-213,253,376.30

Finding the Fourth Proportional to 431,569,339.10, 646,928,855.85 and 213,253,376.30

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Solution

The fourth proportional to 431,569,339.10, 646,928,855.85 and 213,253,376.30 is: 319,669,981.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,569,339.10 : 646,928,855.85 = 213,253,376.30 : x
  2. Step 2: Convert to fraction form
    431,569,339.10/646,928,855.85 = 213,253,376.30/x
  3. Step 3: Cross multiply
    431,569,339.10x = 646,928,855.85 × 213,253,376.30
  4. Step 4: Simplify right side
    431,569,339.10x = 137,959,762,735,908,512
  5. Step 5: Solve for x
    x = 137,959,762,735,908,512/431,569,339.10
  6. Step 6: Final answer
    x = 319,669,981.71

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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.