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Finding the Fourth Proportional to 641,728.70, 885,678.26 and 369,744.47

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Solution

The fourth proportional to 641,728.70, 885,678.26 and 369,744.47 is: 510,300.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,728.70 : 885,678.26 = 369,744.47 : x
  2. Step 2: Convert to fraction form
    641,728.70/885,678.26 = 369,744.47/x
  3. Step 3: Cross multiply
    641,728.70x = 885,678.26 × 369,744.47
  4. Step 4: Simplify right side
    641,728.70x = 327,474,632,557.11
  5. Step 5: Solve for x
    x = 327,474,632,557.11/641,728.70
  6. Step 6: Final answer
    x = 510,300.75

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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.