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Finding the Fourth Proportional to 279,303.51, 385,478.72 and 156,808.83

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Solution

The fourth proportional to 279,303.51, 385,478.72 and 156,808.83 is: 216,418.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,303.51 : 385,478.72 = 156,808.83 : x
  2. Step 2: Convert to fraction form
    279,303.51/385,478.72 = 156,808.83/x
  3. Step 3: Cross multiply
    279,303.51x = 385,478.72 × 156,808.83
  4. Step 4: Simplify right side
    279,303.51x = 60,446,466,289.05
  5. Step 5: Solve for x
    x = 60,446,466,289.05/279,303.51
  6. Step 6: Final answer
    x = 216,418.57

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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.