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Finding the Fourth Proportional to 384,663.15, 530,807.34 and 212,579.06

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Solution

The fourth proportional to 384,663.15, 530,807.34 and 212,579.06 is: 293,343.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,663.15 : 530,807.34 = 212,579.06 : x
  2. Step 2: Convert to fraction form
    384,663.15/530,807.34 = 212,579.06/x
  3. Step 3: Cross multiply
    384,663.15x = 530,807.34 × 212,579.06
  4. Step 4: Simplify right side
    384,663.15x = 112,838,524,051.28
  5. Step 5: Solve for x
    x = 112,838,524,051.28/384,663.15
  6. Step 6: Final answer
    x = 293,343.73

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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.