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Finding the Fourth Proportional to 621,752.90, 858,018.96 and 353,480.90

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Solution

The fourth proportional to 621,752.90, 858,018.96 and 353,480.90 is: 487,803.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,752.90 : 858,018.96 = 353,480.90 : x
  2. Step 2: Convert to fraction form
    621,752.90/858,018.96 = 353,480.90/x
  3. Step 3: Cross multiply
    621,752.90x = 858,018.96 × 353,480.90
  4. Step 4: Simplify right side
    621,752.90x = 303,293,314,197.86
  5. Step 5: Solve for x
    x = 303,293,314,197.86/621,752.90
  6. Step 6: Final answer
    x = 487,803.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.