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Finding the Fourth Proportional to 425,620.40, 638,430.60 and 357,191.60

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Solution

The fourth proportional to 425,620.40, 638,430.60 and 357,191.60 is: 535,787.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,620.40 : 638,430.60 = 357,191.60 : x
  2. Step 2: Convert to fraction form
    425,620.40/638,430.60 = 357,191.60/x
  3. Step 3: Cross multiply
    425,620.40x = 638,430.60 × 357,191.60
  4. Step 4: Simplify right side
    425,620.40x = 228,042,047,502.96
  5. Step 5: Solve for x
    x = 228,042,047,502.96/425,620.40
  6. Step 6: Final answer
    x = 535,787.40

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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.