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Finding the Fourth Proportional to 667,667.53, 920,878.90 and 463,718.71

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Solution

The fourth proportional to 667,667.53, 920,878.90 and 463,718.71 is: 639,582.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,667.53 : 920,878.90 = 463,718.71 : x
  2. Step 2: Convert to fraction form
    667,667.53/920,878.90 = 463,718.71/x
  3. Step 3: Cross multiply
    667,667.53x = 920,878.90 × 463,718.71
  4. Step 4: Simplify right side
    667,667.53x = 427,028,775,574.22
  5. Step 5: Solve for x
    x = 427,028,775,574.22/667,667.53
  6. Step 6: Final answer
    x = 639,582.96

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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.