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Finding the Fourth Proportional to 4,978.36, 6,865.62 and 4,088.92

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Solution

The fourth proportional to 4,978.36, 6,865.62 and 4,088.92 is: 5,639.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.36 : 6,865.62 = 4,088.92 : x
  2. Step 2: Convert to fraction form
    4,978.36/6,865.62 = 4,088.92/x
  3. Step 3: Cross multiply
    4,978.36x = 6,865.62 × 4,088.92
  4. Step 4: Simplify right side
    4,978.36x = 28,072,970.93
  5. Step 5: Solve for x
    x = 28,072,970.93/4,978.36
  6. Step 6: Final answer
    x = 5,639.00

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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.