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Finding the Fourth Proportional to 640,393.68, 883,744.69 and 350,009.90

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Solution

The fourth proportional to 640,393.68, 883,744.69 and 350,009.90 is: 483,014.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,393.68 : 883,744.69 = 350,009.90 : x
  2. Step 2: Convert to fraction form
    640,393.68/883,744.69 = 350,009.90/x
  3. Step 3: Cross multiply
    640,393.68x = 883,744.69 × 350,009.90
  4. Step 4: Simplify right side
    640,393.68x = 309,319,390,572.43
  5. Step 5: Solve for x
    x = 309,319,390,572.43/640,393.68
  6. Step 6: Final answer
    x = 483,014.43

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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.