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Finding the Fourth Proportional to 318,543.31, 477,319.20 and 118,810.27

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Solution

The fourth proportional to 318,543.31, 477,319.20 and 118,810.27 is: 178,030.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,543.31 : 477,319.20 = 118,810.27 : x
  2. Step 2: Convert to fraction form
    318,543.31/477,319.20 = 118,810.27/x
  3. Step 3: Cross multiply
    318,543.31x = 477,319.20 × 118,810.27
  4. Step 4: Simplify right side
    318,543.31x = 56,710,423,028.18
  5. Step 5: Solve for x
    x = 56,710,423,028.18/318,543.31
  6. Step 6: Final answer
    x = 178,030.49

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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.