Home / 640,479.48-883,736.10-385,844.64

Finding the Fourth Proportional to 640,479.48, 883,736.10 and 385,844.64

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Solution

The fourth proportional to 640,479.48, 883,736.10 and 385,844.64 is: 532,389.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,479.48 : 883,736.10 = 385,844.64 : x
  2. Step 2: Convert to fraction form
    640,479.48/883,736.10 = 385,844.64/x
  3. Step 3: Cross multiply
    640,479.48x = 883,736.10 × 385,844.64
  4. Step 4: Simplify right side
    640,479.48x = 340,984,837,359.50
  5. Step 5: Solve for x
    x = 340,984,837,359.50/640,479.48
  6. Step 6: Final answer
    x = 532,389.95

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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.