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Finding the Fourth Proportional to 413,490.51, 619,861.23 and 287,190.39

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Solution

The fourth proportional to 413,490.51, 619,861.23 and 287,190.39 is: 430,525.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,490.51 : 619,861.23 = 287,190.39 : x
  2. Step 2: Convert to fraction form
    413,490.51/619,861.23 = 287,190.39/x
  3. Step 3: Cross multiply
    413,490.51x = 619,861.23 × 287,190.39
  4. Step 4: Simplify right side
    413,490.51x = 178,018,188,389.58
  5. Step 5: Solve for x
    x = 178,018,188,389.58/413,490.51
  6. Step 6: Final answer
    x = 430,525.45

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1.5x scale

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.