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Finding the Fourth Proportional to 978,004.20, 1,349,644.82 and 548,284.44

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Solution

The fourth proportional to 978,004.20, 1,349,644.82 and 548,284.44 is: 756,631.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,004.20 : 1,349,644.82 = 548,284.44 : x
  2. Step 2: Convert to fraction form
    978,004.20/1,349,644.82 = 548,284.44/x
  3. Step 3: Cross multiply
    978,004.20x = 1,349,644.82 × 548,284.44
  4. Step 4: Simplify right side
    978,004.20x = 739,989,254,332.60
  5. Step 5: Solve for x
    x = 739,989,254,332.60/978,004.20
  6. Step 6: Final answer
    x = 756,631.98

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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.