Home / 434,220.80-651,308.16-138,709.76

Finding the Fourth Proportional to 434,220.80, 651,308.16 and 138,709.76

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Solution

The fourth proportional to 434,220.80, 651,308.16 and 138,709.76 is: 208,057.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,220.80 : 651,308.16 = 138,709.76 : x
  2. Step 2: Convert to fraction form
    434,220.80/651,308.16 = 138,709.76/x
  3. Step 3: Cross multiply
    434,220.80x = 651,308.16 × 138,709.76
  4. Step 4: Simplify right side
    434,220.80x = 90,342,798,559.64
  5. Step 5: Solve for x
    x = 90,342,798,559.64/434,220.80
  6. Step 6: Final answer
    x = 208,057.28

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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.