Home / 278,345.27-417,490.21-128,583.42

Finding the Fourth Proportional to 278,345.27, 417,490.21 and 128,583.42

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Solution

The fourth proportional to 278,345.27, 417,490.21 and 128,583.42 is: 192,862.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,345.27 : 417,490.21 = 128,583.42 : x
  2. Step 2: Convert to fraction form
    278,345.27/417,490.21 = 128,583.42/x
  3. Step 3: Cross multiply
    278,345.27x = 417,490.21 × 128,583.42
  4. Step 4: Simplify right side
    278,345.27x = 53,682,319,018.32
  5. Step 5: Solve for x
    x = 53,682,319,018.32/278,345.27
  6. Step 6: Final answer
    x = 192,862.34

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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.