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Finding the Fourth Proportional to 489,041.60, 685,124.80 and 489,041.60

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Solution

The fourth proportional to 489,041.60, 685,124.80 and 489,041.60 is: 685,124.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,041.60 : 685,124.80 = 489,041.60 : x
  2. Step 2: Convert to fraction form
    489,041.60/685,124.80 = 489,041.60/x
  3. Step 3: Cross multiply
    489,041.60x = 685,124.80 × 489,041.60
  4. Step 4: Simplify right side
    489,041.60x = 335,054,528,391.68
  5. Step 5: Solve for x
    x = 335,054,528,391.68/489,041.60
  6. Step 6: Final answer
    x = 685,124.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.