Home / 645,324.65-890,511.39-358,838.57

Finding the Fourth Proportional to 645,324.65, 890,511.39 and 358,838.57

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Solution

The fourth proportional to 645,324.65, 890,511.39 and 358,838.57 is: 495,176.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,324.65 : 890,511.39 = 358,838.57 : x
  2. Step 2: Convert to fraction form
    645,324.65/890,511.39 = 358,838.57/x
  3. Step 3: Cross multiply
    645,324.65x = 890,511.39 × 358,838.57
  4. Step 4: Simplify right side
    645,324.65x = 319,549,833,756.31
  5. Step 5: Solve for x
    x = 319,549,833,756.31/645,324.65
  6. Step 6: Final answer
    x = 495,176.86

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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.