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Finding the Fourth Proportional to 264,005.60, 396,004.80 and 86,518.40

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Solution

The fourth proportional to 264,005.60, 396,004.80 and 86,518.40 is: 129,776.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,005.60 : 396,004.80 = 86,518.40 : x
  2. Step 2: Convert to fraction form
    264,005.60/396,004.80 = 86,518.40/x
  3. Step 3: Cross multiply
    264,005.60x = 396,004.80 × 86,518.40
  4. Step 4: Simplify right side
    264,005.60x = 34,261,701,688.32
  5. Step 5: Solve for x
    x = 34,261,701,688.32/264,005.60
  6. Step 6: Final answer
    x = 129,776.42

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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.