Home / 709,900.81-979,655.68-387,609.91

Finding the Fourth Proportional to 709,900.81, 979,655.68 and 387,609.91

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Solution

The fourth proportional to 709,900.81, 979,655.68 and 387,609.91 is: 534,897.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,900.81 : 979,655.68 = 387,609.91 : x
  2. Step 2: Convert to fraction form
    709,900.81/979,655.68 = 387,609.91/x
  3. Step 3: Cross multiply
    709,900.81x = 979,655.68 × 387,609.91
  4. Step 4: Simplify right side
    709,900.81x = 379,724,249,955.79
  5. Step 5: Solve for x
    x = 379,724,249,955.79/709,900.81
  6. Step 6: Final answer
    x = 534,897.61

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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.