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Finding the Fourth Proportional to 390,283.35, 538,393.77 and 261,227.22

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Solution

The fourth proportional to 390,283.35, 538,393.77 and 261,227.22 is: 360,361.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,283.35 : 538,393.77 = 261,227.22 : x
  2. Step 2: Convert to fraction form
    390,283.35/538,393.77 = 261,227.22/x
  3. Step 3: Cross multiply
    390,283.35x = 538,393.77 × 261,227.22
  4. Step 4: Simplify right side
    390,283.35x = 140,643,107,802.42
  5. Step 5: Solve for x
    x = 140,643,107,802.42/390,283.35
  6. Step 6: Final answer
    x = 360,361.54

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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.