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Finding the Fourth Proportional to 393,547.52, 590,339.72 and 127,328.87

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Solution

The fourth proportional to 393,547.52, 590,339.72 and 127,328.87 is: 190,999.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,547.52 : 590,339.72 = 127,328.87 : x
  2. Step 2: Convert to fraction form
    393,547.52/590,339.72 = 127,328.87/x
  3. Step 3: Cross multiply
    393,547.52x = 590,339.72 × 127,328.87
  4. Step 4: Simplify right side
    393,547.52x = 75,167,291,257.89
  5. Step 5: Solve for x
    x = 75,167,291,257.89/393,547.52
  6. Step 6: Final answer
    x = 190,999.27

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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.