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Finding the Fourth Proportional to 621,625.60, 933,129.60 and 385,235.20

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Solution

The fourth proportional to 621,625.60, 933,129.60 and 385,235.20 is: 578,281.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,625.60 : 933,129.60 = 385,235.20 : x
  2. Step 2: Convert to fraction form
    621,625.60/933,129.60 = 385,235.20/x
  3. Step 3: Cross multiply
    621,625.60x = 933,129.60 × 385,235.20
  4. Step 4: Simplify right side
    621,625.60x = 359,474,368,081.92
  5. Step 5: Solve for x
    x = 359,474,368,081.92/621,625.60
  6. Step 6: Final answer
    x = 578,281.15

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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.