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Finding the Fourth Proportional to 307,435.32, 424,553.88 and 290,661.66

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Solution

The fourth proportional to 307,435.32, 424,553.88 and 290,661.66 is: 401,390.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,435.32 : 424,553.88 = 290,661.66 : x
  2. Step 2: Convert to fraction form
    307,435.32/424,553.88 = 290,661.66/x
  3. Step 3: Cross multiply
    307,435.32x = 424,553.88 × 290,661.66
  4. Step 4: Simplify right side
    307,435.32x = 123,401,535,520.24
  5. Step 5: Solve for x
    x = 123,401,535,520.24/307,435.32
  6. Step 6: Final answer
    x = 401,390.24

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1.5x scale

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.