Home / 428,246.20-642,218.10-147,698.20

Finding the Fourth Proportional to 428,246.20, 642,218.10 and 147,698.20

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Solution

The fourth proportional to 428,246.20, 642,218.10 and 147,698.20 is: 221,495.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,246.20 : 642,218.10 = 147,698.20 : x
  2. Step 2: Convert to fraction form
    428,246.20/642,218.10 = 147,698.20/x
  3. Step 3: Cross multiply
    428,246.20x = 642,218.10 × 147,698.20
  4. Step 4: Simplify right side
    428,246.20x = 94,854,457,377.42
  5. Step 5: Solve for x
    x = 94,854,457,377.42/428,246.20
  6. Step 6: Final answer
    x = 221,495.15

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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.