Home / 1,258,215.30-1,885,749.12-990,920.16

Finding the Fourth Proportional to 1,258,215.30, 1,885,749.12 and 990,920.16

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Solution

The fourth proportional to 1,258,215.30, 1,885,749.12 and 990,920.16 is: 1,485,140.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258,215.30 : 1,885,749.12 = 990,920.16 : x
  2. Step 2: Convert to fraction form
    1,258,215.30/1,885,749.12 = 990,920.16/x
  3. Step 3: Cross multiply
    1,258,215.30x = 1,885,749.12 × 990,920.16
  4. Step 4: Simplify right side
    1,258,215.30x = 1,868,626,819,710.26
  5. Step 5: Solve for x
    x = 1,868,626,819,710.26/1,258,215.30
  6. Step 6: Final answer
    x = 1,485,140.75

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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.