Home / 390,282.85-538,393.08-261,226.72

Finding the Fourth Proportional to 390,282.85, 538,393.08 and 261,226.72

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Solution

The fourth proportional to 390,282.85, 538,393.08 and 261,226.72 is: 360,360.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,282.85 : 538,393.08 = 261,226.72 : x
  2. Step 2: Convert to fraction form
    390,282.85/538,393.08 = 261,226.72/x
  3. Step 3: Cross multiply
    390,282.85x = 538,393.08 × 261,226.72
  4. Step 4: Simplify right side
    390,282.85x = 140,642,658,359.10
  5. Step 5: Solve for x
    x = 140,642,658,359.10/390,282.85
  6. Step 6: Final answer
    x = 360,360.85

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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.