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Finding the Fourth Proportional to 476,638.74, 715,056.59 and 139,690.44

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Solution

The fourth proportional to 476,638.74, 715,056.59 and 139,690.44 is: 209,564.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,638.74 : 715,056.59 = 139,690.44 : x
  2. Step 2: Convert to fraction form
    476,638.74/715,056.59 = 139,690.44/x
  3. Step 3: Cross multiply
    476,638.74x = 715,056.59 × 139,690.44
  4. Step 4: Simplify right side
    476,638.74x = 99,886,569,682.00
  5. Step 5: Solve for x
    x = 99,886,569,682.00/476,638.74
  6. Step 6: Final answer
    x = 209,564.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.