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Finding the Fourth Proportional to 1,429,731.04, 1,973,061.92 and 817,941.28

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Solution

The fourth proportional to 1,429,731.04, 1,973,061.92 and 817,941.28 is: 1,128,777.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429,731.04 : 1,973,061.92 = 817,941.28 : x
  2. Step 2: Convert to fraction form
    1,429,731.04/1,973,061.92 = 817,941.28/x
  3. Step 3: Cross multiply
    1,429,731.04x = 1,973,061.92 × 817,941.28
  4. Step 4: Simplify right side
    1,429,731.04x = 1,613,848,792,364.06
  5. Step 5: Solve for x
    x = 1,613,848,792,364.06/1,429,731.04
  6. Step 6: Final answer
    x = 1,128,777.89

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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.