Home / 644,934.84-890,094.06-390,290.28

Finding the Fourth Proportional to 644,934.84, 890,094.06 and 390,290.28

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Solution

The fourth proportional to 644,934.84, 890,094.06 and 390,290.28 is: 538,651.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,934.84 : 890,094.06 = 390,290.28 : x
  2. Step 2: Convert to fraction form
    644,934.84/890,094.06 = 390,290.28/x
  3. Step 3: Cross multiply
    644,934.84x = 890,094.06 × 390,290.28
  4. Step 4: Simplify right side
    644,934.84x = 347,395,059,903.74
  5. Step 5: Solve for x
    x = 347,395,059,903.74/644,934.84
  6. Step 6: Final answer
    x = 538,651.41

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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.