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Finding the Fourth Proportional to 991,584, 1,371,988.80 and 864,524.16

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Solution

The fourth proportional to 991,584, 1,371,988.80 and 864,524.16 is: 1,196,184.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,584 : 1,371,988.80 = 864,524.16 : x
  2. Step 2: Convert to fraction form
    991,584/1,371,988.80 = 864,524.16/x
  3. Step 3: Cross multiply
    991,584x = 1,371,988.80 × 864,524.16
  4. Step 4: Simplify right side
    991,584x = 1,186,117,464,849.41
  5. Step 5: Solve for x
    x = 1,186,117,464,849.41/991,584
  6. Step 6: Final answer
    x = 1,196,184.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.