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Finding the Fourth Proportional to 535,401.40, 738,877.10 and 320,499.88

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Solution

The fourth proportional to 535,401.40, 738,877.10 and 320,499.88 is: 442,303.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    535,401.40 : 738,877.10 = 320,499.88 : x
  2. Step 2: Convert to fraction form
    535,401.40/738,877.10 = 320,499.88/x
  3. Step 3: Cross multiply
    535,401.40x = 738,877.10 × 320,499.88
  4. Step 4: Simplify right side
    535,401.40x = 236,810,021,884.75
  5. Step 5: Solve for x
    x = 236,810,021,884.75/535,401.40
  6. Step 6: Final answer
    x = 442,303.70

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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.