Home / 436,220.20-654,330.30-429,999.40

Finding the Fourth Proportional to 436,220.20, 654,330.30 and 429,999.40

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Solution

The fourth proportional to 436,220.20, 654,330.30 and 429,999.40 is: 644,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,220.20 : 654,330.30 = 429,999.40 : x
  2. Step 2: Convert to fraction form
    436,220.20/654,330.30 = 429,999.40/x
  3. Step 3: Cross multiply
    436,220.20x = 654,330.30 × 429,999.40
  4. Step 4: Simplify right side
    436,220.20x = 281,361,636,401.82
  5. Step 5: Solve for x
    x = 281,361,636,401.82/436,220.20
  6. Step 6: Final answer
    x = 644,999.10

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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.