Home / 457,746.20-686,619.30-388,626.20

Finding the Fourth Proportional to 457,746.20, 686,619.30 and 388,626.20

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Solution

The fourth proportional to 457,746.20, 686,619.30 and 388,626.20 is: 582,939.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,746.20 : 686,619.30 = 388,626.20 : x
  2. Step 2: Convert to fraction form
    457,746.20/686,619.30 = 388,626.20/x
  3. Step 3: Cross multiply
    457,746.20x = 686,619.30 × 388,626.20
  4. Step 4: Simplify right side
    457,746.20x = 266,838,249,405.66
  5. Step 5: Solve for x
    x = 266,838,249,405.66/457,746.20
  6. Step 6: Final answer
    x = 582,939.30

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Similar ratio
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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.