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Finding the Fourth Proportional to 426,216.74, 639,253.82 and 156,289.10

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Solution

The fourth proportional to 426,216.74, 639,253.82 and 156,289.10 is: 234,407.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,216.74 : 639,253.82 = 156,289.10 : x
  2. Step 2: Convert to fraction form
    426,216.74/639,253.82 = 156,289.10/x
  3. Step 3: Cross multiply
    426,216.74x = 639,253.82 × 156,289.10
  4. Step 4: Simplify right side
    426,216.74x = 99,908,401,393.82
  5. Step 5: Solve for x
    x = 99,908,401,393.82/426,216.74
  6. Step 6: Final answer
    x = 234,407.50

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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.