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Finding the Fourth Proportional to 671,636.70, 1,006,871.85 and 405,114.30

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Solution

The fourth proportional to 671,636.70, 1,006,871.85 and 405,114.30 is: 607,319.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,636.70 : 1,006,871.85 = 405,114.30 : x
  2. Step 2: Convert to fraction form
    671,636.70/1,006,871.85 = 405,114.30/x
  3. Step 3: Cross multiply
    671,636.70x = 1,006,871.85 × 405,114.30
  4. Step 4: Simplify right side
    671,636.70x = 407,898,184,702.46
  5. Step 5: Solve for x
    x = 407,898,184,702.46/671,636.70
  6. Step 6: Final answer
    x = 607,319.68

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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.