Home / 500,431.28-690,423.60-285,416.72

Finding the Fourth Proportional to 500,431.28, 690,423.60 and 285,416.72

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Solution

The fourth proportional to 500,431.28, 690,423.60 and 285,416.72 is: 393,777.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,431.28 : 690,423.60 = 285,416.72 : x
  2. Step 2: Convert to fraction form
    500,431.28/690,423.60 = 285,416.72/x
  3. Step 3: Cross multiply
    500,431.28x = 690,423.60 × 285,416.72
  4. Step 4: Simplify right side
    500,431.28x = 197,058,439,322.59
  5. Step 5: Solve for x
    x = 197,058,439,322.59/500,431.28
  6. Step 6: Final answer
    x = 393,777.22

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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.