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Finding the Fourth Proportional to 661,056.79, 991,585.52 and 436,364.71

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Solution

The fourth proportional to 661,056.79, 991,585.52 and 436,364.71 is: 654,547.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,056.79 : 991,585.52 = 436,364.71 : x
  2. Step 2: Convert to fraction form
    661,056.79/991,585.52 = 436,364.71/x
  3. Step 3: Cross multiply
    661,056.79x = 991,585.52 × 436,364.71
  4. Step 4: Simplify right side
    661,056.79x = 432,692,926,932.66
  5. Step 5: Solve for x
    x = 432,692,926,932.66/661,056.79
  6. Step 6: Final answer
    x = 654,547.28

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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.