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Finding the Fourth Proportional to 628,333.20, 940,426.20 and 487,328.40

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Solution

The fourth proportional to 628,333.20, 940,426.20 and 487,328.40 is: 729,384.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,333.20 : 940,426.20 = 487,328.40 : x
  2. Step 2: Convert to fraction form
    628,333.20/940,426.20 = 487,328.40/x
  3. Step 3: Cross multiply
    628,333.20x = 940,426.20 × 487,328.40
  4. Step 4: Simplify right side
    628,333.20x = 458,296,395,364.08
  5. Step 5: Solve for x
    x = 458,296,395,364.08/628,333.20
  6. Step 6: Final answer
    x = 729,384.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.