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Finding the Fourth Proportional to 545,311.80, 817,967.70 and 345,857.40

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Solution

The fourth proportional to 545,311.80, 817,967.70 and 345,857.40 is: 518,786.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,311.80 : 817,967.70 = 345,857.40 : x
  2. Step 2: Convert to fraction form
    545,311.80/817,967.70 = 345,857.40/x
  3. Step 3: Cross multiply
    545,311.80x = 817,967.70 × 345,857.40
  4. Step 4: Simplify right side
    545,311.80x = 282,900,182,005.98
  5. Step 5: Solve for x
    x = 282,900,182,005.98/545,311.80
  6. Step 6: Final answer
    x = 518,786.10

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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.