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Finding the Fourth Proportional to 354,840.60, 530,964.90 and 261,528.60

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Solution

The fourth proportional to 354,840.60, 530,964.90 and 261,528.60 is: 391,337.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,840.60 : 530,964.90 = 261,528.60 : x
  2. Step 2: Convert to fraction form
    354,840.60/530,964.90 = 261,528.60/x
  3. Step 3: Cross multiply
    354,840.60x = 530,964.90 × 261,528.60
  4. Step 4: Simplify right side
    354,840.60x = 138,862,506,946.14
  5. Step 5: Solve for x
    x = 138,862,506,946.14/354,840.60
  6. Step 6: Final answer
    x = 391,337.71

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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.