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Finding the Fourth Proportional to 389,490.62, 537,494.01 and 210,642.62

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Solution

The fourth proportional to 389,490.62, 537,494.01 and 210,642.62 is: 290,685.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,490.62 : 537,494.01 = 210,642.62 : x
  2. Step 2: Convert to fraction form
    389,490.62/537,494.01 = 210,642.62/x
  3. Step 3: Cross multiply
    389,490.62x = 537,494.01 × 210,642.62
  4. Step 4: Simplify right side
    389,490.62x = 113,219,146,500.71
  5. Step 5: Solve for x
    x = 113,219,146,500.71/389,490.62
  6. Step 6: Final answer
    x = 290,685.17

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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.