Home / 1,221,139,838.40-1,685,019,661.92-825,523,431.36

Finding the Fourth Proportional to 1,221,139,838.40, 1,685,019,661.92 and 825,523,431.36

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Solution

The fourth proportional to 1,221,139,838.40, 1,685,019,661.92 and 825,523,431.36 is: 1,139,118,690.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,139,838.40 : 1,685,019,661.92 = 825,523,431.36 : x
  2. Step 2: Convert to fraction form
    1,221,139,838.40/1,685,019,661.92 = 825,523,431.36/x
  3. Step 3: Cross multiply
    1,221,139,838.40x = 1,685,019,661.92 × 825,523,431.36
  4. Step 4: Simplify right side
    1,221,139,838.40x = 1,391,023,213,217,265,664
  5. Step 5: Solve for x
    x = 1,391,023,213,217,265,664/1,221,139,838.40
  6. Step 6: Final answer
    x = 1,139,118,690.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.