Home / 390,254.36-538,561.51-220,484.84

Finding the Fourth Proportional to 390,254.36, 538,561.51 and 220,484.84

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Solution

The fourth proportional to 390,254.36, 538,561.51 and 220,484.84 is: 304,275.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,254.36 : 538,561.51 = 220,484.84 : x
  2. Step 2: Convert to fraction form
    390,254.36/538,561.51 = 220,484.84/x
  3. Step 3: Cross multiply
    390,254.36x = 538,561.51 × 220,484.84
  4. Step 4: Simplify right side
    390,254.36x = 118,744,645,118.49
  5. Step 5: Solve for x
    x = 118,744,645,118.49/390,254.36
  6. Step 6: Final answer
    x = 304,275.00

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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.