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Finding the Fourth Proportional to 651,970.60, 978,190.80 and 292,111.90

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Solution

The fourth proportional to 651,970.60, 978,190.80 and 292,111.90 is: 438,273.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,970.60 : 978,190.80 = 292,111.90 : x
  2. Step 2: Convert to fraction form
    651,970.60/978,190.80 = 292,111.90/x
  3. Step 3: Cross multiply
    651,970.60x = 978,190.80 × 292,111.90
  4. Step 4: Simplify right side
    651,970.60x = 285,741,173,150.52
  5. Step 5: Solve for x
    x = 285,741,173,150.52/651,970.60
  6. Step 6: Final answer
    x = 438,273.10

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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.