Home / 390,749.40-586,419.30-285,839.01

Finding the Fourth Proportional to 390,749.40, 586,419.30 and 285,839.01

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Solution

The fourth proportional to 390,749.40, 586,419.30 and 285,839.01 is: 428,974.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,749.40 : 586,419.30 = 285,839.01 : x
  2. Step 2: Convert to fraction form
    390,749.40/586,419.30 = 285,839.01/x
  3. Step 3: Cross multiply
    390,749.40x = 586,419.30 × 285,839.01
  4. Step 4: Simplify right side
    390,749.40x = 167,621,512,156.89
  5. Step 5: Solve for x
    x = 167,621,512,156.89/390,749.40
  6. Step 6: Final answer
    x = 428,974.46

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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.