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Finding the Fourth Proportional to 389,666.76, 538,111.49 and 368,437.95

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Solution

The fourth proportional to 389,666.76, 538,111.49 and 368,437.95 is: 508,795.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,666.76 : 538,111.49 = 368,437.95 : x
  2. Step 2: Convert to fraction form
    389,666.76/538,111.49 = 368,437.95/x
  3. Step 3: Cross multiply
    389,666.76x = 538,111.49 × 368,437.95
  4. Step 4: Simplify right side
    389,666.76x = 198,260,694,247.05
  5. Step 5: Solve for x
    x = 198,260,694,247.05/389,666.76
  6. Step 6: Final answer
    x = 508,795.50

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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.