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Finding the Fourth Proportional to 228,970.74, 315,990.36 and 142,980.60

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Solution

The fourth proportional to 228,970.74, 315,990.36 and 142,980.60 is: 197,319.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,970.74 : 315,990.36 = 142,980.60 : x
  2. Step 2: Convert to fraction form
    228,970.74/315,990.36 = 142,980.60/x
  3. Step 3: Cross multiply
    228,970.74x = 315,990.36 × 142,980.60
  4. Step 4: Simplify right side
    228,970.74x = 45,180,491,267.02
  5. Step 5: Solve for x
    x = 45,180,491,267.02/228,970.74
  6. Step 6: Final answer
    x = 197,319.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.