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Finding the Fourth Proportional to 604,638,903.40, 906,958,355.10 and 389,471,108.20

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Solution

The fourth proportional to 604,638,903.40, 906,958,355.10 and 389,471,108.20 is: 584,206,662.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,638,903.40 : 906,958,355.10 = 389,471,108.20 : x
  2. Step 2: Convert to fraction form
    604,638,903.40/906,958,355.10 = 389,471,108.20/x
  3. Step 3: Cross multiply
    604,638,903.40x = 906,958,355.10 × 389,471,108.20
  4. Step 4: Simplify right side
    604,638,903.40x = 353,234,075,652,046,144
  5. Step 5: Solve for x
    x = 353,234,075,652,046,144/604,638,903.40
  6. Step 6: Final answer
    x = 584,206,662.30

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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.