Home / 280,109.12-386,693.28-216,303.68

Finding the Fourth Proportional to 280,109.12, 386,693.28 and 216,303.68

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Solution

The fourth proportional to 280,109.12, 386,693.28 and 216,303.68 is: 298,609.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,109.12 : 386,693.28 = 216,303.68 : x
  2. Step 2: Convert to fraction form
    280,109.12/386,693.28 = 216,303.68/x
  3. Step 3: Cross multiply
    280,109.12x = 386,693.28 × 216,303.68
  4. Step 4: Simplify right side
    280,109.12x = 83,643,179,495.27
  5. Step 5: Solve for x
    x = 83,643,179,495.27/280,109.12
  6. Step 6: Final answer
    x = 298,609.27

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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.