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Finding the Fourth Proportional to 380,411.61, 570,403.65 and 260,603.65

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Solution

The fourth proportional to 380,411.61, 570,403.65 and 260,603.65 is: 390,759.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,411.61 : 570,403.65 = 260,603.65 : x
  2. Step 2: Convert to fraction form
    380,411.61/570,403.65 = 260,603.65/x
  3. Step 3: Cross multiply
    380,411.61x = 570,403.65 × 260,603.65
  4. Step 4: Simplify right side
    380,411.61x = 148,649,273,163.32
  5. Step 5: Solve for x
    x = 148,649,273,163.32/380,411.61
  6. Step 6: Final answer
    x = 390,759.03

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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.