Home / 1,188,140.32-1,639,720.38-678,831.76

Finding the Fourth Proportional to 1,188,140.32, 1,639,720.38 and 678,831.76

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Solution

The fourth proportional to 1,188,140.32, 1,639,720.38 and 678,831.76 is: 936,837.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,140.32 : 1,639,720.38 = 678,831.76 : x
  2. Step 2: Convert to fraction form
    1,188,140.32/1,639,720.38 = 678,831.76/x
  3. Step 3: Cross multiply
    1,188,140.32x = 1,639,720.38 × 678,831.76
  4. Step 4: Simplify right side
    1,188,140.32x = 1,113,094,271,463.27
  5. Step 5: Solve for x
    x = 1,113,094,271,463.27/1,188,140.32
  6. Step 6: Final answer
    x = 936,837.39

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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.