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Finding the Fourth Proportional to 380,247.90, 570,155.88 and 155,345.03

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Solution

The fourth proportional to 380,247.90, 570,155.88 and 155,345.03 is: 232,929.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,247.90 : 570,155.88 = 155,345.03 : x
  2. Step 2: Convert to fraction form
    380,247.90/570,155.88 = 155,345.03/x
  3. Step 3: Cross multiply
    380,247.90x = 570,155.88 × 155,345.03
  4. Step 4: Simplify right side
    380,247.90x = 88,570,879,432.50
  5. Step 5: Solve for x
    x = 88,570,879,432.50/380,247.90
  6. Step 6: Final answer
    x = 232,929.31

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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.