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Finding the Fourth Proportional to 538,607.20, 808,348.20 and 521,111.20

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Solution

The fourth proportional to 538,607.20, 808,348.20 and 521,111.20 is: 782,089.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,607.20 : 808,348.20 = 521,111.20 : x
  2. Step 2: Convert to fraction form
    538,607.20/808,348.20 = 521,111.20/x
  3. Step 3: Cross multiply
    538,607.20x = 808,348.20 × 521,111.20
  4. Step 4: Simplify right side
    538,607.20x = 421,239,300,519.84
  5. Step 5: Solve for x
    x = 421,239,300,519.84/538,607.20
  6. Step 6: Final answer
    x = 782,089.99

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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.