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Finding the Fourth Proportional to 476,886.74, 715,440.89 and 139,913.78

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Solution

The fourth proportional to 476,886.74, 715,440.89 and 139,913.78 is: 209,903.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,886.74 : 715,440.89 = 139,913.78 : x
  2. Step 2: Convert to fraction form
    476,886.74/715,440.89 = 139,913.78/x
  3. Step 3: Cross multiply
    476,886.74x = 715,440.89 × 139,913.78
  4. Step 4: Simplify right side
    476,886.74x = 100,100,036,059.04
  5. Step 5: Solve for x
    x = 100,100,036,059.04/476,886.74
  6. Step 6: Final answer
    x = 209,903.17

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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.