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Finding the Fourth Proportional to 290,417.70, 406,999.50 and 290,417.70

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Solution

The fourth proportional to 290,417.70, 406,999.50 and 290,417.70 is: 406,999.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,417.70 : 406,999.50 = 290,417.70 : x
  2. Step 2: Convert to fraction form
    290,417.70/406,999.50 = 290,417.70/x
  3. Step 3: Cross multiply
    290,417.70x = 406,999.50 × 290,417.70
  4. Step 4: Simplify right side
    290,417.70x = 118,199,858,691.15
  5. Step 5: Solve for x
    x = 118,199,858,691.15/290,417.70
  6. Step 6: Final answer
    x = 406,999.50

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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.