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Finding the Fourth Proportional to 1,398,598.03, 1,929,883.68 and 786,730.12

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Solution

The fourth proportional to 1,398,598.03, 1,929,883.68 and 786,730.12 is: 1,085,585.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,598.03 : 1,929,883.68 = 786,730.12 : x
  2. Step 2: Convert to fraction form
    1,398,598.03/1,929,883.68 = 786,730.12/x
  3. Step 3: Cross multiply
    1,398,598.03x = 1,929,883.68 × 786,730.12
  4. Step 4: Simplify right side
    1,398,598.03x = 1,518,297,619,152.44
  5. Step 5: Solve for x
    x = 1,518,297,619,152.44/1,398,598.03
  6. Step 6: Final answer
    x = 1,085,585.41

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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.