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Finding the Fourth Proportional to 606,416.40, 909,624.60 and 429,123.60

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Solution

The fourth proportional to 606,416.40, 909,624.60 and 429,123.60 is: 643,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,416.40 : 909,624.60 = 429,123.60 : x
  2. Step 2: Convert to fraction form
    606,416.40/909,624.60 = 429,123.60/x
  3. Step 3: Cross multiply
    606,416.40x = 909,624.60 × 429,123.60
  4. Step 4: Simplify right side
    606,416.40x = 390,341,383,000.56
  5. Step 5: Solve for x
    x = 390,341,383,000.56/606,416.40
  6. Step 6: Final answer
    x = 643,685.40

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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.