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Finding the Fourth Proportional to 318,557.61, 477,411.75 and 118,676.70

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Solution

The fourth proportional to 318,557.61, 477,411.75 and 118,676.70 is: 177,856.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,557.61 : 477,411.75 = 118,676.70 : x
  2. Step 2: Convert to fraction form
    318,557.61/477,411.75 = 118,676.70/x
  3. Step 3: Cross multiply
    318,557.61x = 477,411.75 × 118,676.70
  4. Step 4: Simplify right side
    318,557.61x = 56,657,651,031.23
  5. Step 5: Solve for x
    x = 56,657,651,031.23/318,557.61
  6. Step 6: Final answer
    x = 177,856.84

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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.