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Finding the Fourth Proportional to 691,443, 954,191.34 and 373,491

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Solution

The fourth proportional to 691,443, 954,191.34 and 373,491 is: 515,417.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,443 : 954,191.34 = 373,491 : x
  2. Step 2: Convert to fraction form
    691,443/954,191.34 = 373,491/x
  3. Step 3: Cross multiply
    691,443x = 954,191.34 × 373,491
  4. Step 4: Simplify right side
    691,443x = 356,381,877,767.94
  5. Step 5: Solve for x
    x = 356,381,877,767.94/691,443
  6. Step 6: Final answer
    x = 515,417.58

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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.