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Finding the Fourth Proportional to 519,938.80, 779,908.20 and 425,460.40

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Solution

The fourth proportional to 519,938.80, 779,908.20 and 425,460.40 is: 638,190.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,938.80 : 779,908.20 = 425,460.40 : x
  2. Step 2: Convert to fraction form
    519,938.80/779,908.20 = 425,460.40/x
  3. Step 3: Cross multiply
    519,938.80x = 779,908.20 × 425,460.40
  4. Step 4: Simplify right side
    519,938.80x = 331,820,054,735.28
  5. Step 5: Solve for x
    x = 331,820,054,735.28/519,938.80
  6. Step 6: Final answer
    x = 638,190.60

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Similar ratio
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1.5x scale

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.