Home / 644,758.22-889,848.16-390,111.50

Finding the Fourth Proportional to 644,758.22, 889,848.16 and 390,111.50

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Solution

The fourth proportional to 644,758.22, 889,848.16 and 390,111.50 is: 538,403.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,758.22 : 889,848.16 = 390,111.50 : x
  2. Step 2: Convert to fraction form
    644,758.22/889,848.16 = 390,111.50/x
  3. Step 3: Cross multiply
    644,758.22x = 889,848.16 × 390,111.50
  4. Step 4: Simplify right side
    644,758.22x = 347,139,995,045.32
  5. Step 5: Solve for x
    x = 347,139,995,045.32/644,758.22
  6. Step 6: Final answer
    x = 538,403.37

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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.