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Finding the Fourth Proportional to 668,632.49, 922,712.76 and 378,237.86

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Solution

The fourth proportional to 668,632.49, 922,712.76 and 378,237.86 is: 521,968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,632.49 : 922,712.76 = 378,237.86 : x
  2. Step 2: Convert to fraction form
    668,632.49/922,712.76 = 378,237.86/x
  3. Step 3: Cross multiply
    668,632.49x = 922,712.76 × 378,237.86
  4. Step 4: Simplify right side
    668,632.49x = 349,004,899,737.09
  5. Step 5: Solve for x
    x = 349,004,899,737.09/668,632.49
  6. Step 6: Final answer
    x = 521,968.20

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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.