Home / 434,628.80-653,692.80-389,139.20

Finding the Fourth Proportional to 434,628.80, 653,692.80 and 389,139.20

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Solution

The fourth proportional to 434,628.80, 653,692.80 and 389,139.20 is: 585,275.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,628.80 : 653,692.80 = 389,139.20 : x
  2. Step 2: Convert to fraction form
    434,628.80/653,692.80 = 389,139.20/x
  3. Step 3: Cross multiply
    434,628.80x = 653,692.80 × 389,139.20
  4. Step 4: Simplify right side
    434,628.80x = 254,377,493,237.76
  5. Step 5: Solve for x
    x = 254,377,493,237.76/434,628.80
  6. Step 6: Final answer
    x = 585,275.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.