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Finding the Fourth Proportional to 535,374.21, 738,817.61 and 309,019.53

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Solution

The fourth proportional to 535,374.21, 738,817.61 and 309,019.53 is: 426,447.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    535,374.21 : 738,817.61 = 309,019.53 : x
  2. Step 2: Convert to fraction form
    535,374.21/738,817.61 = 309,019.53/x
  3. Step 3: Cross multiply
    535,374.21x = 738,817.61 × 309,019.53
  4. Step 4: Simplify right side
    535,374.21x = 228,309,069,052.83
  5. Step 5: Solve for x
    x = 228,309,069,052.83/535,374.21
  6. Step 6: Final answer
    x = 426,447.64

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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.