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Finding the Fourth Proportional to 205,280.64, 307,975.20 and 86,956.32

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Solution

The fourth proportional to 205,280.64, 307,975.20 and 86,956.32 is: 130,457.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,280.64 : 307,975.20 = 86,956.32 : x
  2. Step 2: Convert to fraction form
    205,280.64/307,975.20 = 86,956.32/x
  3. Step 3: Cross multiply
    205,280.64x = 307,975.20 × 86,956.32
  4. Step 4: Simplify right side
    205,280.64x = 26,780,390,043.26
  5. Step 5: Solve for x
    x = 26,780,390,043.26/205,280.64
  6. Step 6: Final answer
    x = 130,457.46

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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.