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Finding the Fourth Proportional to 605,055.60, 905,615.10 and 471,211.20

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Solution

The fourth proportional to 605,055.60, 905,615.10 and 471,211.20 is: 705,283.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,055.60 : 905,615.10 = 471,211.20 : x
  2. Step 2: Convert to fraction form
    605,055.60/905,615.10 = 471,211.20/x
  3. Step 3: Cross multiply
    605,055.60x = 905,615.10 × 471,211.20
  4. Step 4: Simplify right side
    605,055.60x = 426,735,978,009.12
  5. Step 5: Solve for x
    x = 426,735,978,009.12/605,055.60
  6. Step 6: Final answer
    x = 705,283.91

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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.