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Finding the Fourth Proportional to 978,003.81, 1,349,710.04 and 548,311.77

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Solution

The fourth proportional to 978,003.81, 1,349,710.04 and 548,311.77 is: 756,706.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,003.81 : 1,349,710.04 = 548,311.77 : x
  2. Step 2: Convert to fraction form
    978,003.81/1,349,710.04 = 548,311.77/x
  3. Step 3: Cross multiply
    978,003.81x = 1,349,710.04 × 548,311.77
  4. Step 4: Simplify right side
    978,003.81x = 740,061,898,277.61
  5. Step 5: Solve for x
    x = 740,061,898,277.61/978,003.81
  6. Step 6: Final answer
    x = 756,706.56

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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.