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Finding the Fourth Proportional to 539,478.40, 808,342.80 and 339,440.80

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Solution

The fourth proportional to 539,478.40, 808,342.80 and 339,440.80 is: 508,610.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,478.40 : 808,342.80 = 339,440.80 : x
  2. Step 2: Convert to fraction form
    539,478.40/808,342.80 = 339,440.80/x
  3. Step 3: Cross multiply
    539,478.40x = 808,342.80 × 339,440.80
  4. Step 4: Simplify right side
    539,478.40x = 274,384,526,706.24
  5. Step 5: Solve for x
    x = 274,384,526,706.24/539,478.40
  6. Step 6: Final answer
    x = 508,610.77

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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.