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Finding the Fourth Proportional to 412,937.76, 618,988.32 and 279,831.48

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Solution

The fourth proportional to 412,937.76, 618,988.32 and 279,831.48 is: 419,463.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,937.76 : 618,988.32 = 279,831.48 : x
  2. Step 2: Convert to fraction form
    412,937.76/618,988.32 = 279,831.48/x
  3. Step 3: Cross multiply
    412,937.76x = 618,988.32 × 279,831.48
  4. Step 4: Simplify right side
    412,937.76x = 173,212,417,688.31
  5. Step 5: Solve for x
    x = 173,212,417,688.31/412,937.76
  6. Step 6: Final answer
    x = 419,463.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.