Home / 426,497.40-639,438.90-239,566.20

Finding the Fourth Proportional to 426,497.40, 639,438.90 and 239,566.20

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Solution

The fourth proportional to 426,497.40, 639,438.90 and 239,566.20 is: 359,176.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,497.40 : 639,438.90 = 239,566.20 : x
  2. Step 2: Convert to fraction form
    426,497.40/639,438.90 = 239,566.20/x
  3. Step 3: Cross multiply
    426,497.40x = 639,438.90 × 239,566.20
  4. Step 4: Simplify right side
    426,497.40x = 153,187,947,405.18
  5. Step 5: Solve for x
    x = 153,187,947,405.18/426,497.40
  6. Step 6: Final answer
    x = 359,176.74

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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.