Home / 1,390,266.30-2,085,399.45-1,325,312.40

Finding the Fourth Proportional to 1,390,266.30, 2,085,399.45 and 1,325,312.40

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Solution

The fourth proportional to 1,390,266.30, 2,085,399.45 and 1,325,312.40 is: 1,987,968.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,266.30 : 2,085,399.45 = 1,325,312.40 : x
  2. Step 2: Convert to fraction form
    1,390,266.30/2,085,399.45 = 1,325,312.40/x
  3. Step 3: Cross multiply
    1,390,266.30x = 2,085,399.45 × 1,325,312.40
  4. Step 4: Simplify right side
    1,390,266.30x = 2,763,805,750,038.18
  5. Step 5: Solve for x
    x = 2,763,805,750,038.18/1,390,266.30
  6. Step 6: Final answer
    x = 1,987,968.60

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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.