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Finding the Fourth Proportional to 426,953.60, 639,739.20 and 268,899.20

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Solution

The fourth proportional to 426,953.60, 639,739.20 and 268,899.20 is: 402,913.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,953.60 : 639,739.20 = 268,899.20 : x
  2. Step 2: Convert to fraction form
    426,953.60/639,739.20 = 268,899.20/x
  3. Step 3: Cross multiply
    426,953.60x = 639,739.20 × 268,899.20
  4. Step 4: Simplify right side
    426,953.60x = 172,025,359,088.64
  5. Step 5: Solve for x
    x = 172,025,359,088.64/426,953.60
  6. Step 6: Final answer
    x = 402,913.48

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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.