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Finding the Fourth Proportional to 1,282,528.90, 1,769,734.29 and 738,840.70

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Solution

The fourth proportional to 1,282,528.90, 1,769,734.29 and 738,840.70 is: 1,019,510.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282,528.90 : 1,769,734.29 = 738,840.70 : x
  2. Step 2: Convert to fraction form
    1,282,528.90/1,769,734.29 = 738,840.70/x
  3. Step 3: Cross multiply
    1,282,528.90x = 1,769,734.29 × 738,840.70
  4. Step 4: Simplify right side
    1,282,528.90x = 1,307,551,721,637.60
  5. Step 5: Solve for x
    x = 1,307,551,721,637.60/1,282,528.90
  6. Step 6: Final answer
    x = 1,019,510.53

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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.