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Finding the Fourth Proportional to 384,485.99, 530,580.32 and 212,400.23

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Solution

The fourth proportional to 384,485.99, 530,580.32 and 212,400.23 is: 293,106.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,485.99 : 530,580.32 = 212,400.23 : x
  2. Step 2: Convert to fraction form
    384,485.99/530,580.32 = 212,400.23/x
  3. Step 3: Cross multiply
    384,485.99x = 530,580.32 × 212,400.23
  4. Step 4: Simplify right side
    384,485.99x = 112,695,380,277.82
  5. Step 5: Solve for x
    x = 112,695,380,277.82/384,485.99
  6. Step 6: Final answer
    x = 293,106.60

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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.