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Finding the Fourth Proportional to 485,898.55, 670,539.54 and 271,038.49

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Solution

The fourth proportional to 485,898.55, 670,539.54 and 271,038.49 is: 374,032.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,898.55 : 670,539.54 = 271,038.49 : x
  2. Step 2: Convert to fraction form
    485,898.55/670,539.54 = 271,038.49/x
  3. Step 3: Cross multiply
    485,898.55x = 670,539.54 × 271,038.49
  4. Step 4: Simplify right side
    485,898.55x = 181,742,024,406.90
  5. Step 5: Solve for x
    x = 181,742,024,406.90/485,898.55
  6. Step 6: Final answer
    x = 374,032.86

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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.