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Finding the Fourth Proportional to 519,318.60, 778,977.90 and 519,318.60

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Solution

The fourth proportional to 519,318.60, 778,977.90 and 519,318.60 is: 778,977.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,318.60 : 778,977.90 = 519,318.60 : x
  2. Step 2: Convert to fraction form
    519,318.60/778,977.90 = 519,318.60/x
  3. Step 3: Cross multiply
    519,318.60x = 778,977.90 × 519,318.60
  4. Step 4: Simplify right side
    519,318.60x = 404,537,712,458.94
  5. Step 5: Solve for x
    x = 404,537,712,458.94/519,318.60
  6. Step 6: Final answer
    x = 778,977.90

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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.