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Finding the Fourth Proportional to 610,720.40, 915,643.20 and 255,551.60

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Solution

The fourth proportional to 610,720.40, 915,643.20 and 255,551.60 is: 383,144.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,720.40 : 915,643.20 = 255,551.60 : x
  2. Step 2: Convert to fraction form
    610,720.40/915,643.20 = 255,551.60/x
  3. Step 3: Cross multiply
    610,720.40x = 915,643.20 × 255,551.60
  4. Step 4: Simplify right side
    610,720.40x = 233,994,084,789.12
  5. Step 5: Solve for x
    x = 233,994,084,789.12/610,720.40
  6. Step 6: Final answer
    x = 383,144.37

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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.