Home / 989,036.40-1,483,408.80-279,136.20

Finding the Fourth Proportional to 989,036.40, 1,483,408.80 and 279,136.20

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Solution

The fourth proportional to 989,036.40, 1,483,408.80 and 279,136.20 is: 418,663.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,036.40 : 1,483,408.80 = 279,136.20 : x
  2. Step 2: Convert to fraction form
    989,036.40/1,483,408.80 = 279,136.20/x
  3. Step 3: Cross multiply
    989,036.40x = 1,483,408.80 × 279,136.20
  4. Step 4: Simplify right side
    989,036.40x = 414,073,095,478.56
  5. Step 5: Solve for x
    x = 414,073,095,478.56/989,036.40
  6. Step 6: Final answer
    x = 418,663.15

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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.