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Finding the Fourth Proportional to 340,379.90, 510,885.06 and 172,018.70

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Solution

The fourth proportional to 340,379.90, 510,885.06 and 172,018.70 is: 258,187.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,379.90 : 510,885.06 = 172,018.70 : x
  2. Step 2: Convert to fraction form
    340,379.90/510,885.06 = 172,018.70/x
  3. Step 3: Cross multiply
    340,379.90x = 510,885.06 × 172,018.70
  4. Step 4: Simplify right side
    340,379.90x = 87,881,783,870.62
  5. Step 5: Solve for x
    x = 87,881,783,870.62/340,379.90
  6. Step 6: Final answer
    x = 258,187.35

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1.5x scale

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.