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Finding the Fourth Proportional to 210,165.40, 315,539.70 and 131,433.40

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Solution

The fourth proportional to 210,165.40, 315,539.70 and 131,433.40 is: 197,332.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,165.40 : 315,539.70 = 131,433.40 : x
  2. Step 2: Convert to fraction form
    210,165.40/315,539.70 = 131,433.40/x
  3. Step 3: Cross multiply
    210,165.40x = 315,539.70 × 131,433.40
  4. Step 4: Simplify right side
    210,165.40x = 41,472,455,605.98
  5. Step 5: Solve for x
    x = 41,472,455,605.98/210,165.40
  6. Step 6: Final answer
    x = 197,332.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.