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Finding the Fourth Proportional to 386,031.60, 579,051.72 and 161,426.16

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Solution

The fourth proportional to 386,031.60, 579,051.72 and 161,426.16 is: 242,141.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,031.60 : 579,051.72 = 161,426.16 : x
  2. Step 2: Convert to fraction form
    386,031.60/579,051.72 = 161,426.16/x
  3. Step 3: Cross multiply
    386,031.60x = 579,051.72 × 161,426.16
  4. Step 4: Simplify right side
    386,031.60x = 93,474,095,601.00
  5. Step 5: Solve for x
    x = 93,474,095,601.00/386,031.60
  6. Step 6: Final answer
    x = 242,141.05

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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.