Home / 558,690.88-771,895.44-389,679.52

Finding the Fourth Proportional to 558,690.88, 771,895.44 and 389,679.52

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Solution

The fourth proportional to 558,690.88, 771,895.44 and 389,679.52 is: 538,386.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,690.88 : 771,895.44 = 389,679.52 : x
  2. Step 2: Convert to fraction form
    558,690.88/771,895.44 = 389,679.52/x
  3. Step 3: Cross multiply
    558,690.88x = 771,895.44 × 389,679.52
  4. Step 4: Simplify right side
    558,690.88x = 300,791,844,549.39
  5. Step 5: Solve for x
    x = 300,791,844,549.39/558,690.88
  6. Step 6: Final answer
    x = 538,386.89

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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.