Home / 656,418.12-905,668.05-427,312.59

Finding the Fourth Proportional to 656,418.12, 905,668.05 and 427,312.59

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Solution

The fourth proportional to 656,418.12, 905,668.05 and 427,312.59 is: 589,568.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,418.12 : 905,668.05 = 427,312.59 : x
  2. Step 2: Convert to fraction form
    656,418.12/905,668.05 = 427,312.59/x
  3. Step 3: Cross multiply
    656,418.12x = 905,668.05 × 427,312.59
  4. Step 4: Simplify right side
    656,418.12x = 387,003,360,125.75
  5. Step 5: Solve for x
    x = 387,003,360,125.75/656,418.12
  6. Step 6: Final answer
    x = 589,568.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.