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Finding the Fourth Proportional to 339,699.64, 509,492.58 and 102,985.72

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Solution

The fourth proportional to 339,699.64, 509,492.58 and 102,985.72 is: 154,461.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,699.64 : 509,492.58 = 102,985.72 : x
  2. Step 2: Convert to fraction form
    339,699.64/509,492.58 = 102,985.72/x
  3. Step 3: Cross multiply
    339,699.64x = 509,492.58 × 102,985.72
  4. Step 4: Simplify right side
    339,699.64x = 52,470,460,185.96
  5. Step 5: Solve for x
    x = 52,470,460,185.96/339,699.64
  6. Step 6: Final answer
    x = 154,461.34

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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.