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Finding the Fourth Proportional to 500,477.40, 690,487.20 and 285,462.72

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Solution

The fourth proportional to 500,477.40, 690,487.20 and 285,462.72 is: 393,840.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,477.40 : 690,487.20 = 285,462.72 : x
  2. Step 2: Convert to fraction form
    500,477.40/690,487.20 = 285,462.72/x
  3. Step 3: Cross multiply
    500,477.40x = 690,487.20 × 285,462.72
  4. Step 4: Simplify right side
    500,477.40x = 197,108,354,237.18
  5. Step 5: Solve for x
    x = 197,108,354,237.18/500,477.40
  6. Step 6: Final answer
    x = 393,840.67

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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.