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Finding the Fourth Proportional to 628,409.80, 942,614.70 and 486,692.20

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Solution

The fourth proportional to 628,409.80, 942,614.70 and 486,692.20 is: 730,038.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,409.80 : 942,614.70 = 486,692.20 : x
  2. Step 2: Convert to fraction form
    628,409.80/942,614.70 = 486,692.20/x
  3. Step 3: Cross multiply
    628,409.80x = 942,614.70 × 486,692.20
  4. Step 4: Simplify right side
    628,409.80x = 458,763,222,095.34
  5. Step 5: Solve for x
    x = 458,763,222,095.34/628,409.80
  6. Step 6: Final answer
    x = 730,038.30

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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.