Home / 320,210.42-480,298.32-162,434.78

Finding the Fourth Proportional to 320,210.42, 480,298.32 and 162,434.78

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Solution

The fourth proportional to 320,210.42, 480,298.32 and 162,434.78 is: 243,643.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,210.42 : 480,298.32 = 162,434.78 : x
  2. Step 2: Convert to fraction form
    320,210.42/480,298.32 = 162,434.78/x
  3. Step 3: Cross multiply
    320,210.42x = 480,298.32 × 162,434.78
  4. Step 4: Simplify right side
    320,210.42x = 78,017,148,729.90
  5. Step 5: Solve for x
    x = 78,017,148,729.90/320,210.42
  6. Step 6: Final answer
    x = 243,643.38

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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.