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Finding the Fourth Proportional to 318,008.64, 438,756.12 and 190,637.76

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Solution

The fourth proportional to 318,008.64, 438,756.12 and 190,637.76 is: 263,022.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,008.64 : 438,756.12 = 190,637.76 : x
  2. Step 2: Convert to fraction form
    318,008.64/438,756.12 = 190,637.76/x
  3. Step 3: Cross multiply
    318,008.64x = 438,756.12 × 190,637.76
  4. Step 4: Simplify right side
    318,008.64x = 83,643,483,903.09
  5. Step 5: Solve for x
    x = 83,643,483,903.09/318,008.64
  6. Step 6: Final answer
    x = 263,022.68

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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.