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Finding the Fourth Proportional to 539,320.80, 808,981.20 and 371,359.20

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Solution

The fourth proportional to 539,320.80, 808,981.20 and 371,359.20 is: 557,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,320.80 : 808,981.20 = 371,359.20 : x
  2. Step 2: Convert to fraction form
    539,320.80/808,981.20 = 371,359.20/x
  3. Step 3: Cross multiply
    539,320.80x = 808,981.20 × 371,359.20
  4. Step 4: Simplify right side
    539,320.80x = 300,422,611,247.04
  5. Step 5: Solve for x
    x = 300,422,611,247.04/539,320.80
  6. Step 6: Final answer
    x = 557,038.80

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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.