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Finding the Fourth Proportional to 290,423,564.80, 406,895,321.60 and 290,423,564.80

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Solution

The fourth proportional to 290,423,564.80, 406,895,321.60 and 290,423,564.80 is: 406,895,321.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,423,564.80 : 406,895,321.60 = 290,423,564.80 : x
  2. Step 2: Convert to fraction form
    290,423,564.80/406,895,321.60 = 290,423,564.80/x
  3. Step 3: Cross multiply
    290,423,564.80x = 406,895,321.60 × 290,423,564.80
  4. Step 4: Simplify right side
    290,423,564.80x = 118,171,989,799,514,448
  5. Step 5: Solve for x
    x = 118,171,989,799,514,448/290,423,564.80
  6. Step 6: Final answer
    x = 406,895,321.60

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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.