Home / 645,923.60-890,450.78-454,342.40

Finding the Fourth Proportional to 645,923.60, 890,450.78 and 454,342.40

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Solution

The fourth proportional to 645,923.60, 890,450.78 and 454,342.40 is: 626,342.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,923.60 : 890,450.78 = 454,342.40 : x
  2. Step 2: Convert to fraction form
    645,923.60/890,450.78 = 454,342.40/x
  3. Step 3: Cross multiply
    645,923.60x = 890,450.78 × 454,342.40
  4. Step 4: Simplify right side
    645,923.60x = 404,569,544,467.07
  5. Step 5: Solve for x
    x = 404,569,544,467.07/645,923.60
  6. Step 6: Final answer
    x = 626,342.72

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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.