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Finding the Fourth Proportional to 521,130.72, 781,122.60 and 340,999.68

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Solution

The fourth proportional to 521,130.72, 781,122.60 and 340,999.68 is: 511,124.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,130.72 : 781,122.60 = 340,999.68 : x
  2. Step 2: Convert to fraction form
    521,130.72/781,122.60 = 340,999.68/x
  3. Step 3: Cross multiply
    521,130.72x = 781,122.60 × 340,999.68
  4. Step 4: Simplify right side
    521,130.72x = 266,362,556,640.77
  5. Step 5: Solve for x
    x = 266,362,556,640.77/521,130.72
  6. Step 6: Final answer
    x = 511,124.27

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1.5x scale

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.