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Finding the Fourth Proportional to 640,426.59, 960,605.28 and 324,875.34

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Solution

The fourth proportional to 640,426.59, 960,605.28 and 324,875.34 is: 487,295.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,426.59 : 960,605.28 = 324,875.34 : x
  2. Step 2: Convert to fraction form
    640,426.59/960,605.28 = 324,875.34/x
  3. Step 3: Cross multiply
    640,426.59x = 960,605.28 × 324,875.34
  4. Step 4: Simplify right side
    640,426.59x = 312,076,966,945.80
  5. Step 5: Solve for x
    x = 312,076,966,945.80/640,426.59
  6. Step 6: Final answer
    x = 487,295.46

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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.