Home / 640,927.80-961,391.70-401,779.35

Finding the Fourth Proportional to 640,927.80, 961,391.70 and 401,779.35

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Solution

The fourth proportional to 640,927.80, 961,391.70 and 401,779.35 is: 602,669.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,927.80 : 961,391.70 = 401,779.35 : x
  2. Step 2: Convert to fraction form
    640,927.80/961,391.70 = 401,779.35/x
  3. Step 3: Cross multiply
    640,927.80x = 961,391.70 × 401,779.35
  4. Step 4: Simplify right side
    640,927.80x = 386,267,332,321.40
  5. Step 5: Solve for x
    x = 386,267,332,321.40/640,927.80
  6. Step 6: Final answer
    x = 602,669.03

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1.5x scale

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.