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Finding the Fourth Proportional to 578,639.70, 797,989.89 and 397,031.22

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Solution

The fourth proportional to 578,639.70, 797,989.89 and 397,031.22 is: 547,537.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,639.70 : 797,989.89 = 397,031.22 : x
  2. Step 2: Convert to fraction form
    578,639.70/797,989.89 = 397,031.22/x
  3. Step 3: Cross multiply
    578,639.70x = 797,989.89 × 397,031.22
  4. Step 4: Simplify right side
    578,639.70x = 316,826,899,574.37
  5. Step 5: Solve for x
    x = 316,826,899,574.37/578,639.70
  6. Step 6: Final answer
    x = 547,537.44

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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.