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Finding the Fourth Proportional to 385,624.80, 578,437.20 and 259,653.60

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Solution

The fourth proportional to 385,624.80, 578,437.20 and 259,653.60 is: 389,480.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,624.80 : 578,437.20 = 259,653.60 : x
  2. Step 2: Convert to fraction form
    385,624.80/578,437.20 = 259,653.60/x
  3. Step 3: Cross multiply
    385,624.80x = 578,437.20 × 259,653.60
  4. Step 4: Simplify right side
    385,624.80x = 150,193,301,353.92
  5. Step 5: Solve for x
    x = 150,193,301,353.92/385,624.80
  6. Step 6: Final answer
    x = 389,480.40

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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.