Home / 718,196,477.12-991,110,690.48-388,171,616.12

Finding the Fourth Proportional to 718,196,477.12, 991,110,690.48 and 388,171,616.12

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Solution

The fourth proportional to 718,196,477.12, 991,110,690.48 and 388,171,616.12 is: 535,676,588.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,196,477.12 : 991,110,690.48 = 388,171,616.12 : x
  2. Step 2: Convert to fraction form
    718,196,477.12/991,110,690.48 = 388,171,616.12/x
  3. Step 3: Cross multiply
    718,196,477.12x = 991,110,690.48 × 388,171,616.12
  4. Step 4: Simplify right side
    718,196,477.12x = 384,721,038,477,430,720
  5. Step 5: Solve for x
    x = 384,721,038,477,430,720/718,196,477.12
  6. Step 6: Final answer
    x = 535,676,588.14

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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.