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Finding the Fourth Proportional to 500,286.16, 690,502.08 and 318,956.32

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Solution

The fourth proportional to 500,286.16, 690,502.08 and 318,956.32 is: 440,228.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,286.16 : 690,502.08 = 318,956.32 : x
  2. Step 2: Convert to fraction form
    500,286.16/690,502.08 = 318,956.32/x
  3. Step 3: Cross multiply
    500,286.16x = 690,502.08 × 318,956.32
  4. Step 4: Simplify right side
    500,286.16x = 220,240,002,389.15
  5. Step 5: Solve for x
    x = 220,240,002,389.15/500,286.16
  6. Step 6: Final answer
    x = 440,228.05

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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.