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Finding the Fourth Proportional to 1,215,169, 1,676,915.94 and 706,157.80

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Solution

The fourth proportional to 1,215,169, 1,676,915.94 and 706,157.80 is: 974,487.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,169 : 1,676,915.94 = 706,157.80 : x
  2. Step 2: Convert to fraction form
    1,215,169/1,676,915.94 = 706,157.80/x
  3. Step 3: Cross multiply
    1,215,169x = 1,676,915.94 × 706,157.80
  4. Step 4: Simplify right side
    1,215,169x = 1,184,167,270,975.33
  5. Step 5: Solve for x
    x = 1,184,167,270,975.33/1,215,169
  6. Step 6: Final answer
    x = 974,487.72

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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.