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Finding the Fourth Proportional to 660,159.28, 990,079.60 and 304,831.72

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Solution

The fourth proportional to 660,159.28, 990,079.60 and 304,831.72 is: 457,174.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,159.28 : 990,079.60 = 304,831.72 : x
  2. Step 2: Convert to fraction form
    660,159.28/990,079.60 = 304,831.72/x
  3. Step 3: Cross multiply
    660,159.28x = 990,079.60 × 304,831.72
  4. Step 4: Simplify right side
    660,159.28x = 301,807,667,404.91
  5. Step 5: Solve for x
    x = 301,807,667,404.91/660,159.28
  6. Step 6: Final answer
    x = 457,174.01

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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.