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Finding the Fourth Proportional to 1,392,594.23, 1,921,784.93 and 876,689.47

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Solution

The fourth proportional to 1,392,594.23, 1,921,784.93 and 876,689.47 is: 1,209,834.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,594.23 : 1,921,784.93 = 876,689.47 : x
  2. Step 2: Convert to fraction form
    1,392,594.23/1,921,784.93 = 876,689.47/x
  3. Step 3: Cross multiply
    1,392,594.23x = 1,921,784.93 × 876,689.47
  4. Step 4: Simplify right side
    1,392,594.23x = 1,684,808,609,122.95
  5. Step 5: Solve for x
    x = 1,684,808,609,122.95/1,392,594.23
  6. Step 6: Final answer
    x = 1,209,834.54

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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.