Home / 520,623.36-781,055.34-221,113.74

Finding the Fourth Proportional to 520,623.36, 781,055.34 and 221,113.74

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Solution

The fourth proportional to 520,623.36, 781,055.34 and 221,113.74 is: 331,721.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,623.36 : 781,055.34 = 221,113.74 : x
  2. Step 2: Convert to fraction form
    520,623.36/781,055.34 = 221,113.74/x
  3. Step 3: Cross multiply
    520,623.36x = 781,055.34 × 221,113.74
  4. Step 4: Simplify right side
    520,623.36x = 172,702,067,374.37
  5. Step 5: Solve for x
    x = 172,702,067,374.37/520,623.36
  6. Step 6: Final answer
    x = 331,721.70

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1.5x scale

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.