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Finding the Fourth Proportional to 545,309.80, 817,964.70 and 345,855.40

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Solution

The fourth proportional to 545,309.80, 817,964.70 and 345,855.40 is: 518,783.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,309.80 : 817,964.70 = 345,855.40 : x
  2. Step 2: Convert to fraction form
    545,309.80/817,964.70 = 345,855.40/x
  3. Step 3: Cross multiply
    545,309.80x = 817,964.70 × 345,855.40
  4. Step 4: Simplify right side
    545,309.80x = 282,897,508,504.38
  5. Step 5: Solve for x
    x = 282,897,508,504.38/545,309.80
  6. Step 6: Final answer
    x = 518,783.10

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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.