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Finding the Fourth Proportional to 609,444,866.80, 914,167,300.20 and 425,778,857.20

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Solution

The fourth proportional to 609,444,866.80, 914,167,300.20 and 425,778,857.20 is: 638,668,285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,444,866.80 : 914,167,300.20 = 425,778,857.20 : x
  2. Step 2: Convert to fraction form
    609,444,866.80/914,167,300.20 = 425,778,857.20/x
  3. Step 3: Cross multiply
    609,444,866.80x = 914,167,300.20 × 425,778,857.20
  4. Step 4: Simplify right side
    609,444,866.80x = 389,233,108,368,765,312
  5. Step 5: Solve for x
    x = 389,233,108,368,765,312/609,444,866.80
  6. Step 6: Final answer
    x = 638,668,285.80

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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.