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Finding the Fourth Proportional to 315,326.66, 435,624.68 and 206,688.85

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Solution

The fourth proportional to 315,326.66, 435,624.68 and 206,688.85 is: 285,541.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,326.66 : 435,624.68 = 206,688.85 : x
  2. Step 2: Convert to fraction form
    315,326.66/435,624.68 = 206,688.85/x
  3. Step 3: Cross multiply
    315,326.66x = 435,624.68 × 206,688.85
  4. Step 4: Simplify right side
    315,326.66x = 90,038,763,568.48
  5. Step 5: Solve for x
    x = 90,038,763,568.48/315,326.66
  6. Step 6: Final answer
    x = 285,541.24

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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.