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Finding the Fourth Proportional to 885,728.13, 1,328,803.11 and 286,689.39

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Solution

The fourth proportional to 885,728.13, 1,328,803.11 and 286,689.39 is: 430,102.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,728.13 : 1,328,803.11 = 286,689.39 : x
  2. Step 2: Convert to fraction form
    885,728.13/1,328,803.11 = 286,689.39/x
  3. Step 3: Cross multiply
    885,728.13x = 1,328,803.11 × 286,689.39
  4. Step 4: Simplify right side
    885,728.13x = 380,953,753,036.00
  5. Step 5: Solve for x
    x = 380,953,753,036.00/885,728.13
  6. Step 6: Final answer
    x = 430,102.35

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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.