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Finding the Fourth Proportional to 380,409.61, 570,400.65 and 260,601.65

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Solution

The fourth proportional to 380,409.61, 570,400.65 and 260,601.65 is: 390,756.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,409.61 : 570,400.65 = 260,601.65 : x
  2. Step 2: Convert to fraction form
    380,409.61/570,400.65 = 260,601.65/x
  3. Step 3: Cross multiply
    380,409.61x = 570,400.65 × 260,601.65
  4. Step 4: Simplify right side
    380,409.61x = 148,647,350,551.07
  5. Step 5: Solve for x
    x = 148,647,350,551.07/380,409.61
  6. Step 6: Final answer
    x = 390,756.03

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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.