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Finding the Fourth Proportional to 398,666.48, 550,170.81 and 243,642.87

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Solution

The fourth proportional to 398,666.48, 550,170.81 and 243,642.87 is: 336,233.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,666.48 : 550,170.81 = 243,642.87 : x
  2. Step 2: Convert to fraction form
    398,666.48/550,170.81 = 243,642.87/x
  3. Step 3: Cross multiply
    398,666.48x = 550,170.81 × 243,642.87
  4. Step 4: Simplify right side
    398,666.48x = 134,045,195,138.63
  5. Step 5: Solve for x
    x = 134,045,195,138.63/398,666.48
  6. Step 6: Final answer
    x = 336,233.93

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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.