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Finding the Fourth Proportional to 490,342.02, 676,862.91 and 309,018.42

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Solution

The fourth proportional to 490,342.02, 676,862.91 and 309,018.42 is: 426,565.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,342.02 : 676,862.91 = 309,018.42 : x
  2. Step 2: Convert to fraction form
    490,342.02/676,862.91 = 309,018.42/x
  3. Step 3: Cross multiply
    490,342.02x = 676,862.91 × 309,018.42
  4. Step 4: Simplify right side
    490,342.02x = 209,163,107,004.80
  5. Step 5: Solve for x
    x = 209,163,107,004.80/490,342.02
  6. Step 6: Final answer
    x = 426,565.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.