Home / 989,128.10-1,483,484.53-278,990.06

Finding the Fourth Proportional to 989,128.10, 1,483,484.53 and 278,990.06

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Solution

The fourth proportional to 989,128.10, 1,483,484.53 and 278,990.06 is: 418,426.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,128.10 : 1,483,484.53 = 278,990.06 : x
  2. Step 2: Convert to fraction form
    989,128.10/1,483,484.53 = 278,990.06/x
  3. Step 3: Cross multiply
    989,128.10x = 1,483,484.53 × 278,990.06
  4. Step 4: Simplify right side
    989,128.10x = 413,877,438,033.77
  5. Step 5: Solve for x
    x = 413,877,438,033.77/989,128.10
  6. Step 6: Final answer
    x = 418,426.53

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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.