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Finding the Fourth Proportional to 354,615.60, 530,627.40 and 261,303.60

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Solution

The fourth proportional to 354,615.60, 530,627.40 and 261,303.60 is: 391,000.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,615.60 : 530,627.40 = 261,303.60 : x
  2. Step 2: Convert to fraction form
    354,615.60/530,627.40 = 261,303.60/x
  3. Step 3: Cross multiply
    354,615.60x = 530,627.40 × 261,303.60
  4. Step 4: Simplify right side
    354,615.60x = 138,654,849,878.64
  5. Step 5: Solve for x
    x = 138,654,849,878.64/354,615.60
  6. Step 6: Final answer
    x = 391,000.42

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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.