Home / 990,911.70-1,486,075.95-281,001.78

Finding the Fourth Proportional to 990,911.70, 1,486,075.95 and 281,001.78

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Solution

The fourth proportional to 990,911.70, 1,486,075.95 and 281,001.78 is: 421,419.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,911.70 : 1,486,075.95 = 281,001.78 : x
  2. Step 2: Convert to fraction form
    990,911.70/1,486,075.95 = 281,001.78/x
  3. Step 3: Cross multiply
    990,911.70x = 1,486,075.95 × 281,001.78
  4. Step 4: Simplify right side
    990,911.70x = 417,589,987,165.19
  5. Step 5: Solve for x
    x = 417,589,987,165.19/990,911.70
  6. Step 6: Final answer
    x = 421,419.98

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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.