Home / 310,135.34-428,149.32-208,694.18

Finding the Fourth Proportional to 310,135.34, 428,149.32 and 208,694.18

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Solution

The fourth proportional to 310,135.34, 428,149.32 and 208,694.18 is: 288,107.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,135.34 : 428,149.32 = 208,694.18 : x
  2. Step 2: Convert to fraction form
    310,135.34/428,149.32 = 208,694.18/x
  3. Step 3: Cross multiply
    310,135.34x = 428,149.32 × 208,694.18
  4. Step 4: Simplify right side
    310,135.34x = 89,352,271,254.96
  5. Step 5: Solve for x
    x = 89,352,271,254.96/310,135.34
  6. Step 6: Final answer
    x = 288,107.35

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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.