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Finding the Fourth Proportional to 419,272.70, 578,603.34 and 237,990.22

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Solution

The fourth proportional to 419,272.70, 578,603.34 and 237,990.22 is: 328,430.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,272.70 : 578,603.34 = 237,990.22 : x
  2. Step 2: Convert to fraction form
    419,272.70/578,603.34 = 237,990.22/x
  3. Step 3: Cross multiply
    419,272.70x = 578,603.34 × 237,990.22
  4. Step 4: Simplify right side
    419,272.70x = 137,701,934,732.83
  5. Step 5: Solve for x
    x = 137,701,934,732.83/419,272.70
  6. Step 6: Final answer
    x = 328,430.49

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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.