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Finding the Fourth Proportional to 508,910.80, 711,542 and 508,910.80

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Solution

The fourth proportional to 508,910.80, 711,542 and 508,910.80 is: 711,542

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,910.80 : 711,542 = 508,910.80 : x
  2. Step 2: Convert to fraction form
    508,910.80/711,542 = 508,910.80/x
  3. Step 3: Cross multiply
    508,910.80x = 711,542 × 508,910.80
  4. Step 4: Simplify right side
    508,910.80x = 362,111,408,453.60
  5. Step 5: Solve for x
    x = 362,111,408,453.60/508,910.80
  6. Step 6: Final answer
    x = 711,542

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.