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Finding the Fourth Proportional to 373,638.34, 515,486.19 and 287,623.63

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Solution

The fourth proportional to 373,638.34, 515,486.19 and 287,623.63 is: 396,816.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,638.34 : 515,486.19 = 287,623.63 : x
  2. Step 2: Convert to fraction form
    373,638.34/515,486.19 = 287,623.63/x
  3. Step 3: Cross multiply
    373,638.34x = 515,486.19 × 287,623.63
  4. Step 4: Simplify right side
    373,638.34x = 148,266,009,182.67
  5. Step 5: Solve for x
    x = 148,266,009,182.67/373,638.34
  6. Step 6: Final answer
    x = 396,816.90

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1.5x scale

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.