Home / 390,256.36-538,564.27-220,486.84

Finding the Fourth Proportional to 390,256.36, 538,564.27 and 220,486.84

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Solution

The fourth proportional to 390,256.36, 538,564.27 and 220,486.84 is: 304,277.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,256.36 : 538,564.27 = 220,486.84 : x
  2. Step 2: Convert to fraction form
    390,256.36/538,564.27 = 220,486.84/x
  3. Step 3: Cross multiply
    390,256.36x = 538,564.27 × 220,486.84
  4. Step 4: Simplify right side
    390,256.36x = 118,746,334,029.21
  5. Step 5: Solve for x
    x = 118,746,334,029.21/390,256.36
  6. Step 6: Final answer
    x = 304,277.77

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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.