Home / 1,385,421.51-1,912,200.44-812,646.21

Finding the Fourth Proportional to 1,385,421.51, 1,912,200.44 and 812,646.21

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Solution

The fourth proportional to 1,385,421.51, 1,912,200.44 and 812,646.21 is: 1,121,638.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,421.51 : 1,912,200.44 = 812,646.21 : x
  2. Step 2: Convert to fraction form
    1,385,421.51/1,912,200.44 = 812,646.21/x
  3. Step 3: Cross multiply
    1,385,421.51x = 1,912,200.44 × 812,646.21
  4. Step 4: Simplify right side
    1,385,421.51x = 1,553,942,436,263.10
  5. Step 5: Solve for x
    x = 1,553,942,436,263.10/1,385,421.51
  6. Step 6: Final answer
    x = 1,121,638.74

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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.