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Finding the Fourth Proportional to 543,313.40, 815,747.70 and 307,117.40

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Solution

The fourth proportional to 543,313.40, 815,747.70 and 307,117.40 is: 461,115.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,313.40 : 815,747.70 = 307,117.40 : x
  2. Step 2: Convert to fraction form
    543,313.40/815,747.70 = 307,117.40/x
  3. Step 3: Cross multiply
    543,313.40x = 815,747.70 × 307,117.40
  4. Step 4: Simplify right side
    543,313.40x = 250,530,312,679.98
  5. Step 5: Solve for x
    x = 250,530,312,679.98/543,313.40
  6. Step 6: Final answer
    x = 461,115.65

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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.