Home / 1,581,173,715.92-2,180,747,420.56-1,390,026,031.28

Finding the Fourth Proportional to 1,581,173,715.92, 2,180,747,420.56 and 1,390,026,031.28

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Solution

The fourth proportional to 1,581,173,715.92, 2,180,747,420.56 and 1,390,026,031.28 is: 1,917,117,424.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581,173,715.92 : 2,180,747,420.56 = 1,390,026,031.28 : x
  2. Step 2: Convert to fraction form
    1,581,173,715.92/2,180,747,420.56 = 1,390,026,031.28/x
  3. Step 3: Cross multiply
    1,581,173,715.92x = 2,180,747,420.56 × 1,390,026,031.28
  4. Step 4: Simplify right side
    1,581,173,715.92x = 3,031,295,682,225,113,600
  5. Step 5: Solve for x
    x = 3,031,295,682,225,113,600/1,581,173,715.92
  6. Step 6: Final answer
    x = 1,917,117,424.67

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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.