Home / 645,934.41-890,465.58-454,353.21

Finding the Fourth Proportional to 645,934.41, 890,465.58 and 454,353.21

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Solution

The fourth proportional to 645,934.41, 890,465.58 and 454,353.21 is: 626,357.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,934.41 : 890,465.58 = 454,353.21 : x
  2. Step 2: Convert to fraction form
    645,934.41/890,465.58 = 454,353.21/x
  3. Step 3: Cross multiply
    645,934.41x = 890,465.58 × 454,353.21
  4. Step 4: Simplify right side
    645,934.41x = 404,585,894,667.51
  5. Step 5: Solve for x
    x = 404,585,894,667.51/645,934.41
  6. Step 6: Final answer
    x = 626,357.55

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Double scale
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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.