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Finding the Fourth Proportional to 372,158.64, 513,398.52 and 221,148.72

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Solution

The fourth proportional to 372,158.64, 513,398.52 and 221,148.72 is: 305,078.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,158.64 : 513,398.52 = 221,148.72 : x
  2. Step 2: Convert to fraction form
    372,158.64/513,398.52 = 221,148.72/x
  3. Step 3: Cross multiply
    372,158.64x = 513,398.52 × 221,148.72
  4. Step 4: Simplify right side
    372,158.64x = 113,537,425,547.89
  5. Step 5: Solve for x
    x = 113,537,425,547.89/372,158.64
  6. Step 6: Final answer
    x = 305,078.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.