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Finding the Fourth Proportional to 667,391.84, 920,262.75 and 425,290.94

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Solution

The fourth proportional to 667,391.84, 920,262.75 and 425,290.94 is: 586,431.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,391.84 : 920,262.75 = 425,290.94 : x
  2. Step 2: Convert to fraction form
    667,391.84/920,262.75 = 425,290.94/x
  3. Step 3: Cross multiply
    667,391.84x = 920,262.75 × 425,290.94
  4. Step 4: Simplify right side
    667,391.84x = 391,379,405,393.17
  5. Step 5: Solve for x
    x = 391,379,405,393.17/667,391.84
  6. Step 6: Final answer
    x = 586,431.22

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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.