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Finding the Fourth Proportional to 545,138.40, 817,707.60 and 278,810.40

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Solution

The fourth proportional to 545,138.40, 817,707.60 and 278,810.40 is: 418,215.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,138.40 : 817,707.60 = 278,810.40 : x
  2. Step 2: Convert to fraction form
    545,138.40/817,707.60 = 278,810.40/x
  3. Step 3: Cross multiply
    545,138.40x = 817,707.60 × 278,810.40
  4. Step 4: Simplify right side
    545,138.40x = 227,985,383,039.04
  5. Step 5: Solve for x
    x = 227,985,383,039.04/545,138.40
  6. Step 6: Final answer
    x = 418,215.60

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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.