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Finding the Fourth Proportional to 500,285.16, 690,500.70 and 318,955.32

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Solution

The fourth proportional to 500,285.16, 690,500.70 and 318,955.32 is: 440,226.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,285.16 : 690,500.70 = 318,955.32 : x
  2. Step 2: Convert to fraction form
    500,285.16/690,500.70 = 318,955.32/x
  3. Step 3: Cross multiply
    500,285.16x = 690,500.70 × 318,955.32
  4. Step 4: Simplify right side
    500,285.16x = 220,238,871,728.72
  5. Step 5: Solve for x
    x = 220,238,871,728.72/500,285.16
  6. Step 6: Final answer
    x = 440,226.67

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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.