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Finding the Fourth Proportional to 397,143.51, 548,061.30 and 215,855.50

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Solution

The fourth proportional to 397,143.51, 548,061.30 and 215,855.50 is: 297,882.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,143.51 : 548,061.30 = 215,855.50 : x
  2. Step 2: Convert to fraction form
    397,143.51/548,061.30 = 215,855.50/x
  3. Step 3: Cross multiply
    397,143.51x = 548,061.30 × 215,855.50
  4. Step 4: Simplify right side
    397,143.51x = 118,302,044,572.00
  5. Step 5: Solve for x
    x = 118,302,044,572.00/397,143.51
  6. Step 6: Final answer
    x = 297,882.36

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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.