Home / 280,254.36-386,739.18-159,378.78

Finding the Fourth Proportional to 280,254.36, 386,739.18 and 159,378.78

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Solution

The fourth proportional to 280,254.36, 386,739.18 and 159,378.78 is: 219,935.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,254.36 : 386,739.18 = 159,378.78 : x
  2. Step 2: Convert to fraction form
    280,254.36/386,739.18 = 159,378.78/x
  3. Step 3: Cross multiply
    280,254.36x = 386,739.18 × 159,378.78
  4. Step 4: Simplify right side
    280,254.36x = 61,638,018,686.60
  5. Step 5: Solve for x
    x = 61,638,018,686.60/280,254.36
  6. Step 6: Final answer
    x = 219,935.98

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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.