Home / 399,278.30-551,009.40-217,988.16

Finding the Fourth Proportional to 399,278.30, 551,009.40 and 217,988.16

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Solution

The fourth proportional to 399,278.30, 551,009.40 and 217,988.16 is: 300,826.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,278.30 : 551,009.40 = 217,988.16 : x
  2. Step 2: Convert to fraction form
    399,278.30/551,009.40 = 217,988.16/x
  3. Step 3: Cross multiply
    399,278.30x = 551,009.40 × 217,988.16
  4. Step 4: Simplify right side
    399,278.30x = 120,113,525,248.70
  5. Step 5: Solve for x
    x = 120,113,525,248.70/399,278.30
  6. Step 6: Final answer
    x = 300,826.58

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1.5x scale

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.