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Finding the Fourth Proportional to 640,399.32, 883,752.47 and 350,015.53

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Solution

The fourth proportional to 640,399.32, 883,752.47 and 350,015.53 is: 483,022.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,399.32 : 883,752.47 = 350,015.53 : x
  2. Step 2: Convert to fraction form
    640,399.32/883,752.47 = 350,015.53/x
  3. Step 3: Cross multiply
    640,399.32x = 883,752.47 × 350,015.53
  4. Step 4: Simplify right side
    640,399.32x = 309,327,089,175.86
  5. Step 5: Solve for x
    x = 309,327,089,175.86/640,399.32
  6. Step 6: Final answer
    x = 483,022.20

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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.