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Finding the Fourth Proportional to 398,757.12, 598,384.68 and 265,730.72

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Solution

The fourth proportional to 398,757.12, 598,384.68 and 265,730.72 is: 398,762.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,757.12 : 598,384.68 = 265,730.72 : x
  2. Step 2: Convert to fraction form
    398,757.12/598,384.68 = 265,730.72/x
  3. Step 3: Cross multiply
    398,757.12x = 598,384.68 × 265,730.72
  4. Step 4: Simplify right side
    398,757.12x = 159,009,191,853.37
  5. Step 5: Solve for x
    x = 159,009,191,853.37/398,757.12
  6. Step 6: Final answer
    x = 398,762.01

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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.