Home / 617,629.20-926,443.80-428,672.40

Finding the Fourth Proportional to 617,629.20, 926,443.80 and 428,672.40

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Solution

The fourth proportional to 617,629.20, 926,443.80 and 428,672.40 is: 643,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,629.20 : 926,443.80 = 428,672.40 : x
  2. Step 2: Convert to fraction form
    617,629.20/926,443.80 = 428,672.40/x
  3. Step 3: Cross multiply
    617,629.20x = 926,443.80 × 428,672.40
  4. Step 4: Simplify right side
    617,629.20x = 397,140,887,211.12
  5. Step 5: Solve for x
    x = 397,140,887,211.12/617,629.20
  6. Step 6: Final answer
    x = 643,008.60

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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.