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Finding the Fourth Proportional to 489,132.90, 733,699.35 and 445,830.30

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Solution

The fourth proportional to 489,132.90, 733,699.35 and 445,830.30 is: 668,745.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,132.90 : 733,699.35 = 445,830.30 : x
  2. Step 2: Convert to fraction form
    489,132.90/733,699.35 = 445,830.30/x
  3. Step 3: Cross multiply
    489,132.90x = 733,699.35 × 445,830.30
  4. Step 4: Simplify right side
    489,132.90x = 327,105,401,320.31
  5. Step 5: Solve for x
    x = 327,105,401,320.31/489,132.90
  6. Step 6: Final answer
    x = 668,745.45

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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.