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Finding the Fourth Proportional to 529,628.40, 793,405.80 and 318,639.60

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Solution

The fourth proportional to 529,628.40, 793,405.80 and 318,639.60 is: 477,335.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,628.40 : 793,405.80 = 318,639.60 : x
  2. Step 2: Convert to fraction form
    529,628.40/793,405.80 = 318,639.60/x
  3. Step 3: Cross multiply
    529,628.40x = 793,405.80 × 318,639.60
  4. Step 4: Simplify right side
    529,628.40x = 252,810,506,749.68
  5. Step 5: Solve for x
    x = 252,810,506,749.68/529,628.40
  6. Step 6: Final answer
    x = 477,335.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.