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Finding the Fourth Proportional to 347,386.19, 480,449.48 and 311,563.13

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Solution

The fourth proportional to 347,386.19, 480,449.48 and 311,563.13 is: 430,904.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,386.19 : 480,449.48 = 311,563.13 : x
  2. Step 2: Convert to fraction form
    347,386.19/480,449.48 = 311,563.13/x
  3. Step 3: Cross multiply
    347,386.19x = 480,449.48 × 311,563.13
  4. Step 4: Simplify right side
    347,386.19x = 149,690,339,835.61
  5. Step 5: Solve for x
    x = 149,690,339,835.61/347,386.19
  6. Step 6: Final answer
    x = 430,904.70

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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.