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Finding the Fourth Proportional to 539,808.20, 808,416.30 and 289,939.40

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Solution

The fourth proportional to 539,808.20, 808,416.30 and 289,939.40 is: 434,213.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,808.20 : 808,416.30 = 289,939.40 : x
  2. Step 2: Convert to fraction form
    539,808.20/808,416.30 = 289,939.40/x
  3. Step 3: Cross multiply
    539,808.20x = 808,416.30 × 289,939.40
  4. Step 4: Simplify right side
    539,808.20x = 234,391,736,972.22
  5. Step 5: Solve for x
    x = 234,391,736,972.22/539,808.20
  6. Step 6: Final answer
    x = 434,213.00

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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.