Home / 807,420.65-1,211,159.46-427,828.46

Finding the Fourth Proportional to 807,420.65, 1,211,159.46 and 427,828.46

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Solution

The fourth proportional to 807,420.65, 1,211,159.46 and 427,828.46 is: 641,757.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,420.65 : 1,211,159.46 = 427,828.46 : x
  2. Step 2: Convert to fraction form
    807,420.65/1,211,159.46 = 427,828.46/x
  3. Step 3: Cross multiply
    807,420.65x = 1,211,159.46 × 427,828.46
  4. Step 4: Simplify right side
    807,420.65x = 518,168,486,586.23
  5. Step 5: Solve for x
    x = 518,168,486,586.23/807,420.65
  6. Step 6: Final answer
    x = 641,757.78

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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.