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Finding the Fourth Proportional to 389,803.59, 538,058.50 and 228,599.82

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Solution

The fourth proportional to 389,803.59, 538,058.50 and 228,599.82 is: 315,543.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,803.59 : 538,058.50 = 228,599.82 : x
  2. Step 2: Convert to fraction form
    389,803.59/538,058.50 = 228,599.82/x
  3. Step 3: Cross multiply
    389,803.59x = 538,058.50 × 228,599.82
  4. Step 4: Simplify right side
    389,803.59x = 123,000,075,677.97
  5. Step 5: Solve for x
    x = 123,000,075,677.97/389,803.59
  6. Step 6: Final answer
    x = 315,543.72

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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.