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Finding the Fourth Proportional to 545,785.20, 817,900.20 and 402,512.40

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Solution

The fourth proportional to 545,785.20, 817,900.20 and 402,512.40 is: 603,195.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,785.20 : 817,900.20 = 402,512.40 : x
  2. Step 2: Convert to fraction form
    545,785.20/817,900.20 = 402,512.40/x
  3. Step 3: Cross multiply
    545,785.20x = 817,900.20 × 402,512.40
  4. Step 4: Simplify right side
    545,785.20x = 329,214,972,462.48
  5. Step 5: Solve for x
    x = 329,214,972,462.48/545,785.20
  6. Step 6: Final answer
    x = 603,195.13

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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.