Home / 990,231-1,485,537.39-421,601.55

Finding the Fourth Proportional to 990,231, 1,485,537.39 and 421,601.55

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Solution

The fourth proportional to 990,231, 1,485,537.39 and 421,601.55 is: 632,483.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,231 : 1,485,537.39 = 421,601.55 : x
  2. Step 2: Convert to fraction form
    990,231/1,485,537.39 = 421,601.55/x
  3. Step 3: Cross multiply
    990,231x = 1,485,537.39 × 421,601.55
  4. Step 4: Simplify right side
    990,231x = 626,304,866,206.96
  5. Step 5: Solve for x
    x = 626,304,866,206.96/990,231
  6. Step 6: Final answer
    x = 632,483.60

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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.