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Finding the Fourth Proportional to 678,741.79, 936,638 and 376,955.23

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Solution

The fourth proportional to 678,741.79, 936,638 and 376,955.23 is: 520,183.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,741.79 : 936,638 = 376,955.23 : x
  2. Step 2: Convert to fraction form
    678,741.79/936,638 = 376,955.23/x
  3. Step 3: Cross multiply
    678,741.79x = 936,638 × 376,955.23
  4. Step 4: Simplify right side
    678,741.79x = 353,070,592,716.74
  5. Step 5: Solve for x
    x = 353,070,592,716.74/678,741.79
  6. Step 6: Final answer
    x = 520,183.96

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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.