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Finding the Fourth Proportional to 389,666.65, 538,111.34 and 368,437.84

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Solution

The fourth proportional to 389,666.65, 538,111.34 and 368,437.84 is: 508,795.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,666.65 : 538,111.34 = 368,437.84 : x
  2. Step 2: Convert to fraction form
    389,666.65/538,111.34 = 368,437.84/x
  3. Step 3: Cross multiply
    389,666.65x = 538,111.34 × 368,437.84
  4. Step 4: Simplify right side
    389,666.65x = 198,260,579,789.11
  5. Step 5: Solve for x
    x = 198,260,579,789.11/389,666.65
  6. Step 6: Final answer
    x = 508,795.35

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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.