Home / 877,868.48-1,211,500-515,308.16

Finding the Fourth Proportional to 877,868.48, 1,211,500 and 515,308.16

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Solution

The fourth proportional to 877,868.48, 1,211,500 and 515,308.16 is: 711,149.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,868.48 : 1,211,500 = 515,308.16 : x
  2. Step 2: Convert to fraction form
    877,868.48/1,211,500 = 515,308.16/x
  3. Step 3: Cross multiply
    877,868.48x = 1,211,500 × 515,308.16
  4. Step 4: Simplify right side
    877,868.48x = 624,295,835,840
  5. Step 5: Solve for x
    x = 624,295,835,840/877,868.48
  6. Step 6: Final answer
    x = 711,149.62

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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.