Home / 1,386,912.60-2,080,368.90-389,640.60

Finding the Fourth Proportional to 1,386,912.60, 2,080,368.90 and 389,640.60

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Solution

The fourth proportional to 1,386,912.60, 2,080,368.90 and 389,640.60 is: 584,460.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,912.60 : 2,080,368.90 = 389,640.60 : x
  2. Step 2: Convert to fraction form
    1,386,912.60/2,080,368.90 = 389,640.60/x
  3. Step 3: Cross multiply
    1,386,912.60x = 2,080,368.90 × 389,640.60
  4. Step 4: Simplify right side
    1,386,912.60x = 810,596,186,417.34
  5. Step 5: Solve for x
    x = 810,596,186,417.34/1,386,912.60
  6. Step 6: Final answer
    x = 584,460.90

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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.