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Finding the Fourth Proportional to 665,752.70, 998,045.85 and 399,230.30

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Solution

The fourth proportional to 665,752.70, 998,045.85 and 399,230.30 is: 598,495.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,752.70 : 998,045.85 = 399,230.30 : x
  2. Step 2: Convert to fraction form
    665,752.70/998,045.85 = 399,230.30/x
  3. Step 3: Cross multiply
    665,752.70x = 998,045.85 × 399,230.30
  4. Step 4: Simplify right side
    665,752.70x = 398,450,144,109.26
  5. Step 5: Solve for x
    x = 398,450,144,109.26/665,752.70
  6. Step 6: Final answer
    x = 598,495.72

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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.