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Finding the Fourth Proportional to 399,303.69, 550,840.23 and 238,045.11

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Solution

The fourth proportional to 399,303.69, 550,840.23 and 238,045.11 is: 328,383.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,303.69 : 550,840.23 = 238,045.11 : x
  2. Step 2: Convert to fraction form
    399,303.69/550,840.23 = 238,045.11/x
  3. Step 3: Cross multiply
    399,303.69x = 550,840.23 × 238,045.11
  4. Step 4: Simplify right side
    399,303.69x = 131,124,823,142.78
  5. Step 5: Solve for x
    x = 131,124,823,142.78/399,303.69
  6. Step 6: Final answer
    x = 328,383.70

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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.