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Finding the Fourth Proportional to 376,779.61, 519,955.02 and 215,637.80

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Solution

The fourth proportional to 376,779.61, 519,955.02 and 215,637.80 is: 297,579.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,779.61 : 519,955.02 = 215,637.80 : x
  2. Step 2: Convert to fraction form
    376,779.61/519,955.02 = 215,637.80/x
  3. Step 3: Cross multiply
    376,779.61x = 519,955.02 × 215,637.80
  4. Step 4: Simplify right side
    376,779.61x = 112,121,957,911.64
  5. Step 5: Solve for x
    x = 112,121,957,911.64/376,779.61
  6. Step 6: Final answer
    x = 297,579.69

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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.