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Finding the Fourth Proportional to 640,276.20, 958,340.70 and 453,652.20

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Solution

The fourth proportional to 640,276.20, 958,340.70 and 453,652.20 is: 679,009.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,276.20 : 958,340.70 = 453,652.20 : x
  2. Step 2: Convert to fraction form
    640,276.20/958,340.70 = 453,652.20/x
  3. Step 3: Cross multiply
    640,276.20x = 958,340.70 × 453,652.20
  4. Step 4: Simplify right side
    640,276.20x = 434,753,366,904.54
  5. Step 5: Solve for x
    x = 434,753,366,904.54/640,276.20
  6. Step 6: Final answer
    x = 679,009.10

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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.