Home / 645,129.01-890,227.60-358,631.65

Finding the Fourth Proportional to 645,129.01, 890,227.60 and 358,631.65

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Solution

The fourth proportional to 645,129.01, 890,227.60 and 358,631.65 is: 494,883.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,129.01 : 890,227.60 = 358,631.65 : x
  2. Step 2: Convert to fraction form
    645,129.01/890,227.60 = 358,631.65/x
  3. Step 3: Cross multiply
    645,129.01x = 890,227.60 × 358,631.65
  4. Step 4: Simplify right side
    645,129.01x = 319,263,793,960.12
  5. Step 5: Solve for x
    x = 319,263,793,960.12/645,129.01
  6. Step 6: Final answer
    x = 494,883.64

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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.