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Finding the Fourth Proportional to 638,187.60, 956,820.60 and 357,790.80

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Solution

The fourth proportional to 638,187.60, 956,820.60 and 357,790.80 is: 536,427.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,187.60 : 956,820.60 = 357,790.80 : x
  2. Step 2: Convert to fraction form
    638,187.60/956,820.60 = 357,790.80/x
  3. Step 3: Cross multiply
    638,187.60x = 956,820.60 × 357,790.80
  4. Step 4: Simplify right side
    638,187.60x = 342,341,607,930.48
  5. Step 5: Solve for x
    x = 342,341,607,930.48/638,187.60
  6. Step 6: Final answer
    x = 536,427.86

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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.