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Finding the Fourth Proportional to 405,710.80, 607,691.40 and 405,710.80

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Solution

The fourth proportional to 405,710.80, 607,691.40 and 405,710.80 is: 607,691.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,710.80 : 607,691.40 = 405,710.80 : x
  2. Step 2: Convert to fraction form
    405,710.80/607,691.40 = 405,710.80/x
  3. Step 3: Cross multiply
    405,710.80x = 607,691.40 × 405,710.80
  4. Step 4: Simplify right side
    405,710.80x = 246,546,964,047.12
  5. Step 5: Solve for x
    x = 246,546,964,047.12/405,710.80
  6. Step 6: Final answer
    x = 607,691.40

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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.