Home / 1,138,839.32-1,571,838.54-947,666.36

Finding the Fourth Proportional to 1,138,839.32, 1,571,838.54 and 947,666.36

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Solution

The fourth proportional to 1,138,839.32, 1,571,838.54 and 947,666.36 is: 1,307,979.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,839.32 : 1,571,838.54 = 947,666.36 : x
  2. Step 2: Convert to fraction form
    1,138,839.32/1,571,838.54 = 947,666.36/x
  3. Step 3: Cross multiply
    1,138,839.32x = 1,571,838.54 × 947,666.36
  4. Step 4: Simplify right side
    1,138,839.32x = 1,489,578,507,709.51
  5. Step 5: Solve for x
    x = 1,489,578,507,709.51/1,138,839.32
  6. Step 6: Final answer
    x = 1,307,979.52

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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.