Home / 685,087,909.85-945,430,385.52-371,825,878.97

Finding the Fourth Proportional to 685,087,909.85, 945,430,385.52 and 371,825,878.97

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Solution

The fourth proportional to 685,087,909.85, 945,430,385.52 and 371,825,878.97 is: 513,124,635.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,087,909.85 : 945,430,385.52 = 371,825,878.97 : x
  2. Step 2: Convert to fraction form
    685,087,909.85/945,430,385.52 = 371,825,878.97/x
  3. Step 3: Cross multiply
    685,087,909.85x = 945,430,385.52 × 371,825,878.97
  4. Step 4: Simplify right side
    685,087,909.85x = 351,535,484,096,192,768
  5. Step 5: Solve for x
    x = 351,535,484,096,192,768/685,087,909.85
  6. Step 6: Final answer
    x = 513,124,635.60

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1.5x scale

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.