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Finding the Fourth Proportional to 318,807.90, 439,956.18 and 191,485.62

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Solution

The fourth proportional to 318,807.90, 439,956.18 and 191,485.62 is: 264,250.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,807.90 : 439,956.18 = 191,485.62 : x
  2. Step 2: Convert to fraction form
    318,807.90/439,956.18 = 191,485.62/x
  3. Step 3: Cross multiply
    318,807.90x = 439,956.18 × 191,485.62
  4. Step 4: Simplify right side
    318,807.90x = 84,245,281,900.13
  5. Step 5: Solve for x
    x = 84,245,281,900.13/318,807.90
  6. Step 6: Final answer
    x = 264,250.92

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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.