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Finding the Fourth Proportional to 1,287,931.23, 1,777,256.02 and 714,926.29

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Solution

The fourth proportional to 1,287,931.23, 1,777,256.02 and 714,926.29 is: 986,548.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,931.23 : 1,777,256.02 = 714,926.29 : x
  2. Step 2: Convert to fraction form
    1,287,931.23/1,777,256.02 = 714,926.29/x
  3. Step 3: Cross multiply
    1,287,931.23x = 1,777,256.02 × 714,926.29
  4. Step 4: Simplify right side
    1,287,931.23x = 1,270,607,052,758.77
  5. Step 5: Solve for x
    x = 1,270,607,052,758.77/1,287,931.23
  6. Step 6: Final answer
    x = 986,548.83

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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.