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Finding the Fourth Proportional to 354,484.08, 530,477.10 and 221,427

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Solution

The fourth proportional to 354,484.08, 530,477.10 and 221,427 is: 331,360.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,484.08 : 530,477.10 = 221,427 : x
  2. Step 2: Convert to fraction form
    354,484.08/530,477.10 = 221,427/x
  3. Step 3: Cross multiply
    354,484.08x = 530,477.10 × 221,427
  4. Step 4: Simplify right side
    354,484.08x = 117,461,952,821.70
  5. Step 5: Solve for x
    x = 117,461,952,821.70/354,484.08
  6. Step 6: Final answer
    x = 331,360.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.