Home / 390,111.30-585,192.48-120,206.34

Finding the Fourth Proportional to 390,111.30, 585,192.48 and 120,206.34

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Solution

The fourth proportional to 390,111.30, 585,192.48 and 120,206.34 is: 180,317.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,111.30 : 585,192.48 = 120,206.34 : x
  2. Step 2: Convert to fraction form
    390,111.30/585,192.48 = 120,206.34/x
  3. Step 3: Cross multiply
    390,111.30x = 585,192.48 × 120,206.34
  4. Step 4: Simplify right side
    390,111.30x = 70,343,846,216.32
  5. Step 5: Solve for x
    x = 70,343,846,216.32/390,111.30
  6. Step 6: Final answer
    x = 180,317.38

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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.