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Finding the Fourth Proportional to 661,689.60, 992,246.40 and 306,585.60

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Solution

The fourth proportional to 661,689.60, 992,246.40 and 306,585.60 is: 459,744.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,689.60 : 992,246.40 = 306,585.60 : x
  2. Step 2: Convert to fraction form
    661,689.60/992,246.40 = 306,585.60/x
  3. Step 3: Cross multiply
    661,689.60x = 992,246.40 × 306,585.60
  4. Step 4: Simplify right side
    661,689.60x = 304,208,457,891.84
  5. Step 5: Solve for x
    x = 304,208,457,891.84/661,689.60
  6. Step 6: Final answer
    x = 459,744.96

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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.