Home / 645,460.38-890,722.67-358,974.32

Finding the Fourth Proportional to 645,460.38, 890,722.67 and 358,974.32

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Solution

The fourth proportional to 645,460.38, 890,722.67 and 358,974.32 is: 495,377.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,460.38 : 890,722.67 = 358,974.32 : x
  2. Step 2: Convert to fraction form
    645,460.38/890,722.67 = 358,974.32/x
  3. Step 3: Cross multiply
    645,460.38x = 890,722.67 × 358,974.32
  4. Step 4: Simplify right side
    645,460.38x = 319,746,558,523.35
  5. Step 5: Solve for x
    x = 319,746,558,523.35/645,460.38
  6. Step 6: Final answer
    x = 495,377.51

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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.