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Finding the Fourth Proportional to 426,117.20, 639,024.60 and 189,035.60

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Solution

The fourth proportional to 426,117.20, 639,024.60 and 189,035.60 is: 283,486.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,117.20 : 639,024.60 = 189,035.60 : x
  2. Step 2: Convert to fraction form
    426,117.20/639,024.60 = 189,035.60/x
  3. Step 3: Cross multiply
    426,117.20x = 639,024.60 × 189,035.60
  4. Step 4: Simplify right side
    426,117.20x = 120,798,398,675.76
  5. Step 5: Solve for x
    x = 120,798,398,675.76/426,117.20
  6. Step 6: Final answer
    x = 283,486.32

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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.