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Finding the Fourth Proportional to 922,672.90, 1,384,009.35 and 840,004.30

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Solution

The fourth proportional to 922,672.90, 1,384,009.35 and 840,004.30 is: 1,260,006.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,672.90 : 1,384,009.35 = 840,004.30 : x
  2. Step 2: Convert to fraction form
    922,672.90/1,384,009.35 = 840,004.30/x
  3. Step 3: Cross multiply
    922,672.90x = 1,384,009.35 × 840,004.30
  4. Step 4: Simplify right side
    922,672.90x = 1,162,573,805,240.21
  5. Step 5: Solve for x
    x = 1,162,573,805,240.21/922,672.90
  6. Step 6: Final answer
    x = 1,260,006.45

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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.