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Finding the Fourth Proportional to 402,520.83, 555,477.04 and 221,240.40

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Solution

The fourth proportional to 402,520.83, 555,477.04 and 221,240.40 is: 305,310.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,520.83 : 555,477.04 = 221,240.40 : x
  2. Step 2: Convert to fraction form
    402,520.83/555,477.04 = 221,240.40/x
  3. Step 3: Cross multiply
    402,520.83x = 555,477.04 × 221,240.40
  4. Step 4: Simplify right side
    402,520.83x = 122,893,962,520.42
  5. Step 5: Solve for x
    x = 122,893,962,520.42/402,520.83
  6. Step 6: Final answer
    x = 305,310.81

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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.