Home / 455,139.20-628,089.92-253,934.72

Finding the Fourth Proportional to 455,139.20, 628,089.92 and 253,934.72

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Solution

The fourth proportional to 455,139.20, 628,089.92 and 253,934.72 is: 350,428.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,139.20 : 628,089.92 = 253,934.72 : x
  2. Step 2: Convert to fraction form
    455,139.20/628,089.92 = 253,934.72/x
  3. Step 3: Cross multiply
    455,139.20x = 628,089.92 × 253,934.72
  4. Step 4: Simplify right side
    455,139.20x = 159,493,837,970.02
  5. Step 5: Solve for x
    x = 159,493,837,970.02/455,139.20
  6. Step 6: Final answer
    x = 350,428.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.