Home / 389,135.16-536,967.18-287,216.28

Finding the Fourth Proportional to 389,135.16, 536,967.18 and 287,216.28

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Solution

The fourth proportional to 389,135.16, 536,967.18 and 287,216.28 is: 396,329.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,135.16 : 536,967.18 = 287,216.28 : x
  2. Step 2: Convert to fraction form
    389,135.16/536,967.18 = 287,216.28/x
  3. Step 3: Cross multiply
    389,135.16x = 536,967.18 × 287,216.28
  4. Step 4: Simplify right side
    389,135.16x = 154,225,715,921.69
  5. Step 5: Solve for x
    x = 154,225,715,921.69/389,135.16
  6. Step 6: Final answer
    x = 396,329.43

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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.