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Finding the Fourth Proportional to 978,003.15, 1,349,709.13 and 548,311.11

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Solution

The fourth proportional to 978,003.15, 1,349,709.13 and 548,311.11 is: 756,705.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,003.15 : 1,349,709.13 = 548,311.11 : x
  2. Step 2: Convert to fraction form
    978,003.15/1,349,709.13 = 548,311.11/x
  3. Step 3: Cross multiply
    978,003.15x = 1,349,709.13 × 548,311.11
  4. Step 4: Simplify right side
    978,003.15x = 740,060,503,787.16
  5. Step 5: Solve for x
    x = 740,060,503,787.16/978,003.15
  6. Step 6: Final answer
    x = 756,705.65

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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.