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Finding the Fourth Proportional to 660,158.78, 990,078.87 and 304,831.22

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Solution

The fourth proportional to 660,158.78, 990,078.87 and 304,831.22 is: 457,173.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,158.78 : 990,078.87 = 304,831.22 : x
  2. Step 2: Convert to fraction form
    660,158.78/990,078.87 = 304,831.22/x
  3. Step 3: Cross multiply
    660,158.78x = 990,078.87 × 304,831.22
  4. Step 4: Simplify right side
    660,158.78x = 301,806,949,838.32
  5. Step 5: Solve for x
    x = 301,806,949,838.32/660,158.78
  6. Step 6: Final answer
    x = 457,173.27

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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.