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Finding the Fourth Proportional to 436,892.80, 656,030.40 and 319,388.80

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Solution

The fourth proportional to 436,892.80, 656,030.40 and 319,388.80 is: 479,588.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,892.80 : 656,030.40 = 319,388.80 : x
  2. Step 2: Convert to fraction form
    436,892.80/656,030.40 = 319,388.80/x
  3. Step 3: Cross multiply
    436,892.80x = 656,030.40 × 319,388.80
  4. Step 4: Simplify right side
    436,892.80x = 209,528,762,219.52
  5. Step 5: Solve for x
    x = 209,528,762,219.52/436,892.80
  6. Step 6: Final answer
    x = 479,588.50

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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.