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Finding the Fourth Proportional to 485,038.70, 727,558.05 and 443,048.30

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Solution

The fourth proportional to 485,038.70, 727,558.05 and 443,048.30 is: 664,572.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,038.70 : 727,558.05 = 443,048.30 : x
  2. Step 2: Convert to fraction form
    485,038.70/727,558.05 = 443,048.30/x
  3. Step 3: Cross multiply
    485,038.70x = 727,558.05 × 443,048.30
  4. Step 4: Simplify right side
    485,038.70x = 322,343,357,203.82
  5. Step 5: Solve for x
    x = 322,343,357,203.82/485,038.70
  6. Step 6: Final answer
    x = 664,572.45

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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.