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Finding the Fourth Proportional to 543,307.68, 749,558.88 and 400,408.56

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Solution

The fourth proportional to 543,307.68, 749,558.88 and 400,408.56 is: 552,412.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,307.68 : 749,558.88 = 400,408.56 : x
  2. Step 2: Convert to fraction form
    543,307.68/749,558.88 = 400,408.56/x
  3. Step 3: Cross multiply
    543,307.68x = 749,558.88 × 400,408.56
  4. Step 4: Simplify right side
    543,307.68x = 300,129,791,776.01
  5. Step 5: Solve for x
    x = 300,129,791,776.01/543,307.68
  6. Step 6: Final answer
    x = 552,412.20

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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.