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Finding the Fourth Proportional to 561,940.40, 842,910.60 and 507,702.80

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Solution

The fourth proportional to 561,940.40, 842,910.60 and 507,702.80 is: 761,554.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,940.40 : 842,910.60 = 507,702.80 : x
  2. Step 2: Convert to fraction form
    561,940.40/842,910.60 = 507,702.80/x
  3. Step 3: Cross multiply
    561,940.40x = 842,910.60 × 507,702.80
  4. Step 4: Simplify right side
    561,940.40x = 427,948,071,769.68
  5. Step 5: Solve for x
    x = 427,948,071,769.68/561,940.40
  6. Step 6: Final answer
    x = 761,554.20

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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.