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Finding the Fourth Proportional to 607,105.40, 910,658.10 and 429,812.60

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Solution

The fourth proportional to 607,105.40, 910,658.10 and 429,812.60 is: 644,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,105.40 : 910,658.10 = 429,812.60 : x
  2. Step 2: Convert to fraction form
    607,105.40/910,658.10 = 429,812.60/x
  3. Step 3: Cross multiply
    607,105.40x = 910,658.10 × 429,812.60
  4. Step 4: Simplify right side
    607,105.40x = 391,412,325,672.06
  5. Step 5: Solve for x
    x = 391,412,325,672.06/607,105.40
  6. Step 6: Final answer
    x = 644,718.90

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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.