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Finding the Fourth Proportional to 978,755.55, 1,371,657.45 and 978,755.55

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Solution

The fourth proportional to 978,755.55, 1,371,657.45 and 978,755.55 is: 1,371,657.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,755.55 : 1,371,657.45 = 978,755.55 : x
  2. Step 2: Convert to fraction form
    978,755.55/1,371,657.45 = 978,755.55/x
  3. Step 3: Cross multiply
    978,755.55x = 1,371,657.45 × 978,755.55
  4. Step 4: Simplify right side
    978,755.55x = 1,342,517,341,886.35
  5. Step 5: Solve for x
    x = 1,342,517,341,886.35/978,755.55
  6. Step 6: Final answer
    x = 1,371,657.45

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.