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Finding the Fourth Proportional to 631,339.32, 947,462.04 and 428,429.64

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Solution

The fourth proportional to 631,339.32, 947,462.04 and 428,429.64 is: 642,951.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,339.32 : 947,462.04 = 428,429.64 : x
  2. Step 2: Convert to fraction form
    631,339.32/947,462.04 = 428,429.64/x
  3. Step 3: Cross multiply
    631,339.32x = 947,462.04 × 428,429.64
  4. Step 4: Simplify right side
    631,339.32x = 405,920,820,710.87
  5. Step 5: Solve for x
    x = 405,920,820,710.87/631,339.32
  6. Step 6: Final answer
    x = 642,951.91

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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.