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Finding the Fourth Proportional to 620,415.20, 931,497.60 and 384,219.20

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Solution

The fourth proportional to 620,415.20, 931,497.60 and 384,219.20 is: 576,870.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,415.20 : 931,497.60 = 384,219.20 : x
  2. Step 2: Convert to fraction form
    620,415.20/931,497.60 = 384,219.20/x
  3. Step 3: Cross multiply
    620,415.20x = 931,497.60 × 384,219.20
  4. Step 4: Simplify right side
    620,415.20x = 357,899,262,673.92
  5. Step 5: Solve for x
    x = 357,899,262,673.92/620,415.20
  6. Step 6: Final answer
    x = 576,870.56

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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.