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Finding the Fourth Proportional to 398,934.40, 598,401.60 and 346,446.40

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Solution

The fourth proportional to 398,934.40, 598,401.60 and 346,446.40 is: 519,669.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,934.40 : 598,401.60 = 346,446.40 : x
  2. Step 2: Convert to fraction form
    398,934.40/598,401.60 = 346,446.40/x
  3. Step 3: Cross multiply
    398,934.40x = 598,401.60 × 346,446.40
  4. Step 4: Simplify right side
    398,934.40x = 207,314,080,074.24
  5. Step 5: Solve for x
    x = 207,314,080,074.24/398,934.40
  6. Step 6: Final answer
    x = 519,669.60

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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.