Home / 390,989.16-539,550.32-221,226.93

Finding the Fourth Proportional to 390,989.16, 539,550.32 and 221,226.93

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Solution

The fourth proportional to 390,989.16, 539,550.32 and 221,226.93 is: 305,284.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,989.16 : 539,550.32 = 221,226.93 : x
  2. Step 2: Convert to fraction form
    390,989.16/539,550.32 = 221,226.93/x
  3. Step 3: Cross multiply
    390,989.16x = 539,550.32 × 221,226.93
  4. Step 4: Simplify right side
    390,989.16x = 119,363,059,767.98
  5. Step 5: Solve for x
    x = 119,363,059,767.98/390,989.16
  6. Step 6: Final answer
    x = 305,284.83

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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.