Home / 660,450.15-990,423.72-281,131.47

Finding the Fourth Proportional to 660,450.15, 990,423.72 and 281,131.47

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Solution

The fourth proportional to 660,450.15, 990,423.72 and 281,131.47 is: 421,590.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,450.15 : 990,423.72 = 281,131.47 : x
  2. Step 2: Convert to fraction form
    660,450.15/990,423.72 = 281,131.47/x
  3. Step 3: Cross multiply
    660,450.15x = 990,423.72 × 281,131.47
  4. Step 4: Simplify right side
    660,450.15x = 278,439,276,326.47
  5. Step 5: Solve for x
    x = 278,439,276,326.47/660,450.15
  6. Step 6: Final answer
    x = 421,590.15

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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.