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Finding the Fourth Proportional to 519,325.60, 778,930.80 and 145,386.40

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Solution

The fourth proportional to 519,325.60, 778,930.80 and 145,386.40 is: 218,063.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,325.60 : 778,930.80 = 145,386.40 : x
  2. Step 2: Convert to fraction form
    519,325.60/778,930.80 = 145,386.40/x
  3. Step 3: Cross multiply
    519,325.60x = 778,930.80 × 145,386.40
  4. Step 4: Simplify right side
    519,325.60x = 113,245,944,861.12
  5. Step 5: Solve for x
    x = 113,245,944,861.12/519,325.60
  6. Step 6: Final answer
    x = 218,063.47

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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.