Home / 645,468.20-890,757.56-358,988.42

Finding the Fourth Proportional to 645,468.20, 890,757.56 and 358,988.42

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Solution

The fourth proportional to 645,468.20, 890,757.56 and 358,988.42 is: 495,410.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,468.20 : 890,757.56 = 358,988.42 : x
  2. Step 2: Convert to fraction form
    645,468.20/890,757.56 = 358,988.42/x
  3. Step 3: Cross multiply
    645,468.20x = 890,757.56 × 358,988.42
  4. Step 4: Simplify right side
    645,468.20x = 319,771,649,067.46
  5. Step 5: Solve for x
    x = 319,771,649,067.46/645,468.20
  6. Step 6: Final answer
    x = 495,410.38

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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.