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Finding the Fourth Proportional to 545,104.20, 817,802.10 and 387,640.20

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Solution

The fourth proportional to 545,104.20, 817,802.10 and 387,640.20 is: 581,563.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,104.20 : 817,802.10 = 387,640.20 : x
  2. Step 2: Convert to fraction form
    545,104.20/817,802.10 = 387,640.20/x
  3. Step 3: Cross multiply
    545,104.20x = 817,802.10 × 387,640.20
  4. Step 4: Simplify right side
    545,104.20x = 317,012,969,604.42
  5. Step 5: Solve for x
    x = 317,012,969,604.42/545,104.20
  6. Step 6: Final answer
    x = 581,563.98

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1.5x scale

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.