Home / 656,420.12-905,670.81-427,314.59

Finding the Fourth Proportional to 656,420.12, 905,670.81 and 427,314.59

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Solution

The fourth proportional to 656,420.12, 905,670.81 and 427,314.59 is: 589,571.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,420.12 : 905,670.81 = 427,314.59 : x
  2. Step 2: Convert to fraction form
    656,420.12/905,670.81 = 427,314.59/x
  3. Step 3: Cross multiply
    656,420.12x = 905,670.81 × 427,314.59
  4. Step 4: Simplify right side
    656,420.12x = 387,006,350,850.12
  5. Step 5: Solve for x
    x = 387,006,350,850.12/656,420.12
  6. Step 6: Final answer
    x = 589,571.13

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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.