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Finding the Fourth Proportional to 458,608.40, 687,329.40 and 221,440.40

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Solution

The fourth proportional to 458,608.40, 687,329.40 and 221,440.40 is: 331,879.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,608.40 : 687,329.40 = 221,440.40 : x
  2. Step 2: Convert to fraction form
    458,608.40/687,329.40 = 221,440.40/x
  3. Step 3: Cross multiply
    458,608.40x = 687,329.40 × 221,440.40
  4. Step 4: Simplify right side
    458,608.40x = 152,202,497,267.76
  5. Step 5: Solve for x
    x = 152,202,497,267.76/458,608.40
  6. Step 6: Final answer
    x = 331,879.00

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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.