Home / 521,567.10-781,718.85-221,417.55

Finding the Fourth Proportional to 521,567.10, 781,718.85 and 221,417.55

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Solution

The fourth proportional to 521,567.10, 781,718.85 and 221,417.55 is: 331,858.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,567.10 : 781,718.85 = 221,417.55 : x
  2. Step 2: Convert to fraction form
    521,567.10/781,718.85 = 221,417.55/x
  3. Step 3: Cross multiply
    521,567.10x = 781,718.85 × 221,417.55
  4. Step 4: Simplify right side
    521,567.10x = 173,086,272,555.82
  5. Step 5: Solve for x
    x = 173,086,272,555.82/521,567.10
  6. Step 6: Final answer
    x = 331,858.11

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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.