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Finding the Fourth Proportional to 318,497.35, 439,707.63 and 211,212.22

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Solution

The fourth proportional to 318,497.35, 439,707.63 and 211,212.22 is: 291,593.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,497.35 : 439,707.63 = 211,212.22 : x
  2. Step 2: Convert to fraction form
    318,497.35/439,707.63 = 211,212.22/x
  3. Step 3: Cross multiply
    318,497.35x = 439,707.63 × 211,212.22
  4. Step 4: Simplify right side
    318,497.35x = 92,871,624,683.24
  5. Step 5: Solve for x
    x = 92,871,624,683.24/318,497.35
  6. Step 6: Final answer
    x = 291,593.08

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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.