Home / 644,287.20-889,561.04-402,678.24

Finding the Fourth Proportional to 644,287.20, 889,561.04 and 402,678.24

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Solution

The fourth proportional to 644,287.20, 889,561.04 and 402,678.24 is: 555,973.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,287.20 : 889,561.04 = 402,678.24 : x
  2. Step 2: Convert to fraction form
    644,287.20/889,561.04 = 402,678.24/x
  3. Step 3: Cross multiply
    644,287.20x = 889,561.04 × 402,678.24
  4. Step 4: Simplify right side
    644,287.20x = 358,206,873,959.77
  5. Step 5: Solve for x
    x = 358,206,873,959.77/644,287.20
  6. Step 6: Final answer
    x = 555,973.91

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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.