Home / 390,890.40-586,072.80-154,111.20

Finding the Fourth Proportional to 390,890.40, 586,072.80 and 154,111.20

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Solution

The fourth proportional to 390,890.40, 586,072.80 and 154,111.20 is: 231,063.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,890.40 : 586,072.80 = 154,111.20 : x
  2. Step 2: Convert to fraction form
    390,890.40/586,072.80 = 154,111.20/x
  3. Step 3: Cross multiply
    390,890.40x = 586,072.80 × 154,111.20
  4. Step 4: Simplify right side
    390,890.40x = 90,320,382,495.36
  5. Step 5: Solve for x
    x = 90,320,382,495.36/390,890.40
  6. Step 6: Final answer
    x = 231,063.19

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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.