Home / 354,461.28-489,139.32-211,218.12

Finding the Fourth Proportional to 354,461.28, 489,139.32 and 211,218.12

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Solution

The fourth proportional to 354,461.28, 489,139.32 and 211,218.12 is: 291,470.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,461.28 : 489,139.32 = 211,218.12 : x
  2. Step 2: Convert to fraction form
    354,461.28/489,139.32 = 211,218.12/x
  3. Step 3: Cross multiply
    354,461.28x = 489,139.32 × 211,218.12
  4. Step 4: Simplify right side
    354,461.28x = 103,315,087,588.48
  5. Step 5: Solve for x
    x = 103,315,087,588.48/354,461.28
  6. Step 6: Final answer
    x = 291,470.73

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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.