Home / 664,521.70-917,031.77-378,041.17

Finding the Fourth Proportional to 664,521.70, 917,031.77 and 378,041.17

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Solution

The fourth proportional to 664,521.70, 917,031.77 and 378,041.17 is: 521,692.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,521.70 : 917,031.77 = 378,041.17 : x
  2. Step 2: Convert to fraction form
    664,521.70/917,031.77 = 378,041.17/x
  3. Step 3: Cross multiply
    664,521.70x = 917,031.77 × 378,041.17
  4. Step 4: Simplify right side
    664,521.70x = 346,675,761,367.77
  5. Step 5: Solve for x
    x = 346,675,761,367.77/664,521.70
  6. Step 6: Final answer
    x = 521,692.16

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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.