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Finding the Fourth Proportional to 1,429,680.63, 1,973,402.13 and 920,383

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Solution

The fourth proportional to 1,429,680.63, 1,973,402.13 and 920,383 is: 1,270,413.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429,680.63 : 1,973,402.13 = 920,383 : x
  2. Step 2: Convert to fraction form
    1,429,680.63/1,973,402.13 = 920,383/x
  3. Step 3: Cross multiply
    1,429,680.63x = 1,973,402.13 × 920,383
  4. Step 4: Simplify right side
    1,429,680.63x = 1,816,285,772,615.79
  5. Step 5: Solve for x
    x = 1,816,285,772,615.79/1,429,680.63
  6. Step 6: Final answer
    x = 1,270,413.64

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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.