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Finding the Fourth Proportional to 672,125.90, 1,008,480.45 and 339,701.90

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Solution

The fourth proportional to 672,125.90, 1,008,480.45 and 339,701.90 is: 509,700.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,125.90 : 1,008,480.45 = 339,701.90 : x
  2. Step 2: Convert to fraction form
    672,125.90/1,008,480.45 = 339,701.90/x
  3. Step 3: Cross multiply
    672,125.90x = 1,008,480.45 × 339,701.90
  4. Step 4: Simplify right side
    672,125.90x = 342,582,724,977.86
  5. Step 5: Solve for x
    x = 342,582,724,977.86/672,125.90
  6. Step 6: Final answer
    x = 509,700.23

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Double scale
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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.