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Finding the Fourth Proportional to 339,931.70, 509,970.45 and 103,298.30

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Solution

The fourth proportional to 339,931.70, 509,970.45 and 103,298.30 is: 154,969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,931.70 : 509,970.45 = 103,298.30 : x
  2. Step 2: Convert to fraction form
    339,931.70/509,970.45 = 103,298.30/x
  3. Step 3: Cross multiply
    339,931.70x = 509,970.45 × 103,298.30
  4. Step 4: Simplify right side
    339,931.70x = 52,679,080,535.24
  5. Step 5: Solve for x
    x = 52,679,080,535.24/339,931.70
  6. Step 6: Final answer
    x = 154,969.60

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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.