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Finding the Fourth Proportional to 519,020.60, 778,530.90 and 305,569.40

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Solution

The fourth proportional to 519,020.60, 778,530.90 and 305,569.40 is: 458,354.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,020.60 : 778,530.90 = 305,569.40 : x
  2. Step 2: Convert to fraction form
    519,020.60/778,530.90 = 305,569.40/x
  3. Step 3: Cross multiply
    519,020.60x = 778,530.90 × 305,569.40
  4. Step 4: Simplify right side
    519,020.60x = 237,895,219,994.46
  5. Step 5: Solve for x
    x = 237,895,219,994.46/519,020.60
  6. Step 6: Final answer
    x = 458,354.10

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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.