Home / 390,181.28-538,507.40-229,124.56

Finding the Fourth Proportional to 390,181.28, 538,507.40 and 229,124.56

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Solution

The fourth proportional to 390,181.28, 538,507.40 and 229,124.56 is: 316,225.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,181.28 : 538,507.40 = 229,124.56 : x
  2. Step 2: Convert to fraction form
    390,181.28/538,507.40 = 229,124.56/x
  3. Step 3: Cross multiply
    390,181.28x = 538,507.40 × 229,124.56
  4. Step 4: Simplify right side
    390,181.28x = 123,385,271,081.74
  5. Step 5: Solve for x
    x = 123,385,271,081.74/390,181.28
  6. Step 6: Final answer
    x = 316,225.50

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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.