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Finding the Fourth Proportional to 290,401,428.80, 406,864,331.20 and 290,401,428.80

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Solution

The fourth proportional to 290,401,428.80, 406,864,331.20 and 290,401,428.80 is: 406,864,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,401,428.80 : 406,864,331.20 = 290,401,428.80 : x
  2. Step 2: Convert to fraction form
    290,401,428.80/406,864,331.20 = 290,401,428.80/x
  3. Step 3: Cross multiply
    290,401,428.80x = 406,864,331.20 × 290,401,428.80
  4. Step 4: Simplify right side
    290,401,428.80x = 118,153,983,108,236,416
  5. Step 5: Solve for x
    x = 118,153,983,108,236,416/290,401,428.80
  6. Step 6: Final answer
    x = 406,864,331.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.