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Finding the Fourth Proportional to 1,258,518, 1,737,411.48 and 978,494.28

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Solution

The fourth proportional to 1,258,518, 1,737,411.48 and 978,494.28 is: 1,350,832.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258,518 : 1,737,411.48 = 978,494.28 : x
  2. Step 2: Convert to fraction form
    1,258,518/1,737,411.48 = 978,494.28/x
  3. Step 3: Cross multiply
    1,258,518x = 1,737,411.48 × 978,494.28
  4. Step 4: Simplify right side
    1,258,518x = 1,700,047,195,186.33
  5. Step 5: Solve for x
    x = 1,700,047,195,186.33/1,258,518
  6. Step 6: Final answer
    x = 1,350,832.64

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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.