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Finding the Fourth Proportional to 519,248.60, 778,815.30 and 145,309.40

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Solution

The fourth proportional to 519,248.60, 778,815.30 and 145,309.40 is: 217,947.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,248.60 : 778,815.30 = 145,309.40 : x
  2. Step 2: Convert to fraction form
    519,248.60/778,815.30 = 145,309.40/x
  3. Step 3: Cross multiply
    519,248.60x = 778,815.30 × 145,309.40
  4. Step 4: Simplify right side
    519,248.60x = 113,169,183,953.82
  5. Step 5: Solve for x
    x = 113,169,183,953.82/519,248.60
  6. Step 6: Final answer
    x = 217,947.98

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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.