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Finding the Fourth Proportional to 1,178,658, 1,626,548.04 and 642,114

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Solution

The fourth proportional to 1,178,658, 1,626,548.04 and 642,114 is: 886,117.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,658 : 1,626,548.04 = 642,114 : x
  2. Step 2: Convert to fraction form
    1,178,658/1,626,548.04 = 642,114/x
  3. Step 3: Cross multiply
    1,178,658x = 1,626,548.04 × 642,114
  4. Step 4: Simplify right side
    1,178,658x = 1,044,429,268,156.56
  5. Step 5: Solve for x
    x = 1,044,429,268,156.56/1,178,658
  6. Step 6: Final answer
    x = 886,117.32

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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.