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Finding the Fourth Proportional to 718,390.94, 989,556.80 and 548,329.82

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Solution

The fourth proportional to 718,390.94, 989,556.80 and 548,329.82 is: 755,303.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,390.94 : 989,556.80 = 548,329.82 : x
  2. Step 2: Convert to fraction form
    718,390.94/989,556.80 = 548,329.82/x
  3. Step 3: Cross multiply
    718,390.94x = 989,556.80 × 548,329.82
  4. Step 4: Simplify right side
    718,390.94x = 542,603,502,023.78
  5. Step 5: Solve for x
    x = 542,603,502,023.78/718,390.94
  6. Step 6: Final answer
    x = 755,303.93

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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.