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Finding the Fourth Proportional to 550,400.10, 825,600.15 and 390,967.80

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Solution

The fourth proportional to 550,400.10, 825,600.15 and 390,967.80 is: 586,451.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,400.10 : 825,600.15 = 390,967.80 : x
  2. Step 2: Convert to fraction form
    550,400.10/825,600.15 = 390,967.80/x
  3. Step 3: Cross multiply
    550,400.10x = 825,600.15 × 390,967.80
  4. Step 4: Simplify right side
    550,400.10x = 322,783,074,325.17
  5. Step 5: Solve for x
    x = 322,783,074,325.17/550,400.10
  6. Step 6: Final answer
    x = 586,451.70

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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.