Home / 680,624.04-939,316.09-390,262.63

Finding the Fourth Proportional to 680,624.04, 939,316.09 and 390,262.63

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Solution

The fourth proportional to 680,624.04, 939,316.09 and 390,262.63 is: 538,593.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,624.04 : 939,316.09 = 390,262.63 : x
  2. Step 2: Convert to fraction form
    680,624.04/939,316.09 = 390,262.63/x
  3. Step 3: Cross multiply
    680,624.04x = 939,316.09 × 390,262.63
  4. Step 4: Simplify right side
    680,624.04x = 366,579,964,360.77
  5. Step 5: Solve for x
    x = 366,579,964,360.77/680,624.04
  6. Step 6: Final answer
    x = 538,593.91

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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.