Home / 515,046.30-772,569.45-438,938.70

Finding the Fourth Proportional to 515,046.30, 772,569.45 and 438,938.70

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Solution

The fourth proportional to 515,046.30, 772,569.45 and 438,938.70 is: 658,408.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,046.30 : 772,569.45 = 438,938.70 : x
  2. Step 2: Convert to fraction form
    515,046.30/772,569.45 = 438,938.70/x
  3. Step 3: Cross multiply
    515,046.30x = 772,569.45 × 438,938.70
  4. Step 4: Simplify right side
    515,046.30x = 339,110,630,042.72
  5. Step 5: Solve for x
    x = 339,110,630,042.72/515,046.30
  6. Step 6: Final answer
    x = 658,408.05

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Double scale
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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.