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Finding the Fourth Proportional to 822,358.78, 1,134,878.72 and 459,783.57

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Solution

The fourth proportional to 822,358.78, 1,134,878.72 and 459,783.57 is: 634,514.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,358.78 : 1,134,878.72 = 459,783.57 : x
  2. Step 2: Convert to fraction form
    822,358.78/1,134,878.72 = 459,783.57/x
  3. Step 3: Cross multiply
    822,358.78x = 1,134,878.72 × 459,783.57
  4. Step 4: Simplify right side
    822,358.78x = 521,798,585,659.39
  5. Step 5: Solve for x
    x = 521,798,585,659.39/822,358.78
  6. Step 6: Final answer
    x = 634,514.52

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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.