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Finding the Fourth Proportional to 661,318.20, 992,015.70 and 188,038.20

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Solution

The fourth proportional to 661,318.20, 992,015.70 and 188,038.20 is: 282,068.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,318.20 : 992,015.70 = 188,038.20 : x
  2. Step 2: Convert to fraction form
    661,318.20/992,015.70 = 188,038.20/x
  3. Step 3: Cross multiply
    661,318.20x = 992,015.70 × 188,038.20
  4. Step 4: Simplify right side
    661,318.20x = 186,536,846,599.74
  5. Step 5: Solve for x
    x = 186,536,846,599.74/661,318.20
  6. Step 6: Final answer
    x = 282,068.22

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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.