Home / 1,069,148.48-1,475,424.78-639,428.54

Finding the Fourth Proportional to 1,069,148.48, 1,475,424.78 and 639,428.54

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Solution

The fourth proportional to 1,069,148.48, 1,475,424.78 and 639,428.54 is: 882,411.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069,148.48 : 1,475,424.78 = 639,428.54 : x
  2. Step 2: Convert to fraction form
    1,069,148.48/1,475,424.78 = 639,428.54/x
  3. Step 3: Cross multiply
    1,069,148.48x = 1,475,424.78 × 639,428.54
  4. Step 4: Simplify right side
    1,069,148.48x = 943,428,712,955.22
  5. Step 5: Solve for x
    x = 943,428,712,955.22/1,069,148.48
  6. Step 6: Final answer
    x = 882,411.31

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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.