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Finding the Fourth Proportional to 1,369,749.29, 1,890,129.33 and 788,818.50

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Solution

The fourth proportional to 1,369,749.29, 1,890,129.33 and 788,818.50 is: 1,088,497.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,749.29 : 1,890,129.33 = 788,818.50 : x
  2. Step 2: Convert to fraction form
    1,369,749.29/1,890,129.33 = 788,818.50/x
  3. Step 3: Cross multiply
    1,369,749.29x = 1,890,129.33 × 788,818.50
  4. Step 4: Simplify right side
    1,369,749.29x = 1,490,968,982,896.61
  5. Step 5: Solve for x
    x = 1,490,968,982,896.61/1,369,749.29
  6. Step 6: Final answer
    x = 1,088,497.73

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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.