Home / 399,278.18-550,995.47-217,981.35

Finding the Fourth Proportional to 399,278.18, 550,995.47 and 217,981.35

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Solution

The fourth proportional to 399,278.18, 550,995.47 and 217,981.35 is: 300,809.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,278.18 : 550,995.47 = 217,981.35 : x
  2. Step 2: Convert to fraction form
    399,278.18/550,995.47 = 217,981.35/x
  3. Step 3: Cross multiply
    399,278.18x = 550,995.47 × 217,981.35
  4. Step 4: Simplify right side
    399,278.18x = 120,106,732,549.60
  5. Step 5: Solve for x
    x = 120,106,732,549.60/399,278.18
  6. Step 6: Final answer
    x = 300,809.66

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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.