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Finding the Fourth Proportional to 518,836.90, 778,255.35 and 413,860.90

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Solution

The fourth proportional to 518,836.90, 778,255.35 and 413,860.90 is: 620,791.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,836.90 : 778,255.35 = 413,860.90 : x
  2. Step 2: Convert to fraction form
    518,836.90/778,255.35 = 413,860.90/x
  3. Step 3: Cross multiply
    518,836.90x = 778,255.35 × 413,860.90
  4. Step 4: Simplify right side
    518,836.90x = 322,089,459,580.82
  5. Step 5: Solve for x
    x = 322,089,459,580.82/518,836.90
  6. Step 6: Final answer
    x = 620,791.35

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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.