Home / 391,389.91-540,143.84-219,298.52

Finding the Fourth Proportional to 391,389.91, 540,143.84 and 219,298.52

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Solution

The fourth proportional to 391,389.91, 540,143.84 and 219,298.52 is: 302,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,389.91 : 540,143.84 = 219,298.52 : x
  2. Step 2: Convert to fraction form
    391,389.91/540,143.84 = 219,298.52/x
  3. Step 3: Cross multiply
    391,389.91x = 540,143.84 × 219,298.52
  4. Step 4: Simplify right side
    391,389.91x = 118,452,746,597.72
  5. Step 5: Solve for x
    x = 118,452,746,597.72/391,389.91
  6. Step 6: Final answer
    x = 302,646.40

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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.