Home / 645,464.20-890,752.04-358,984.40

Finding the Fourth Proportional to 645,464.20, 890,752.04 and 358,984.40

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Solution

The fourth proportional to 645,464.20, 890,752.04 and 358,984.40 is: 495,404.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,464.20 : 890,752.04 = 358,984.40 : x
  2. Step 2: Convert to fraction form
    645,464.20/890,752.04 = 358,984.40/x
  3. Step 3: Cross multiply
    645,464.20x = 890,752.04 × 358,984.40
  4. Step 4: Simplify right side
    645,464.20x = 319,766,086,628.18
  5. Step 5: Solve for x
    x = 319,766,086,628.18/645,464.20
  6. Step 6: Final answer
    x = 495,404.84

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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.