Home / 378,927,978.19-522,921,420.32-213,915,547.69

Finding the Fourth Proportional to 378,927,978.19, 522,921,420.32 and 213,915,547.69

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Solution

The fourth proportional to 378,927,978.19, 522,921,420.32 and 213,915,547.69 is: 295,203,913.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,927,978.19 : 522,921,420.32 = 213,915,547.69 : x
  2. Step 2: Convert to fraction form
    378,927,978.19/522,921,420.32 = 213,915,547.69/x
  3. Step 3: Cross multiply
    378,927,978.19x = 522,921,420.32 × 213,915,547.69
  4. Step 4: Simplify right side
    378,927,978.19x = 111,861,022,026,585,488
  5. Step 5: Solve for x
    x = 111,861,022,026,585,488/378,927,978.19
  6. Step 6: Final answer
    x = 295,203,913.32

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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.