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Finding the Fourth Proportional to 878,152.32, 1,212,048.96 and 496,400.64

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Solution

The fourth proportional to 878,152.32, 1,212,048.96 and 496,400.64 is: 685,145.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,152.32 : 1,212,048.96 = 496,400.64 : x
  2. Step 2: Convert to fraction form
    878,152.32/1,212,048.96 = 496,400.64/x
  3. Step 3: Cross multiply
    878,152.32x = 1,212,048.96 × 496,400.64
  4. Step 4: Simplify right side
    878,152.32x = 601,661,879,455.33
  5. Step 5: Solve for x
    x = 601,661,879,455.33/878,152.32
  6. Step 6: Final answer
    x = 685,145.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.