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Finding the Fourth Proportional to 363,405.30, 545,205.15 and 258,429.30

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Solution

The fourth proportional to 363,405.30, 545,205.15 and 258,429.30 is: 387,713.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,405.30 : 545,205.15 = 258,429.30 : x
  2. Step 2: Convert to fraction form
    363,405.30/545,205.15 = 258,429.30/x
  3. Step 3: Cross multiply
    363,405.30x = 545,205.15 × 258,429.30
  4. Step 4: Simplify right side
    363,405.30x = 140,896,985,270.90
  5. Step 5: Solve for x
    x = 140,896,985,270.90/363,405.30
  6. Step 6: Final answer
    x = 387,713.07

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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.