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Finding the Fourth Proportional to 520,090.40, 780,135.60 and 370,013.60

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Solution

The fourth proportional to 520,090.40, 780,135.60 and 370,013.60 is: 555,020.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,090.40 : 780,135.60 = 370,013.60 : x
  2. Step 2: Convert to fraction form
    520,090.40/780,135.60 = 370,013.60/x
  3. Step 3: Cross multiply
    520,090.40x = 780,135.60 × 370,013.60
  4. Step 4: Simplify right side
    520,090.40x = 288,660,781,844.16
  5. Step 5: Solve for x
    x = 288,660,781,844.16/520,090.40
  6. Step 6: Final answer
    x = 555,020.40

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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.