Home / 685,498.47-946,094.67-391,148.78

Finding the Fourth Proportional to 685,498.47, 946,094.67 and 391,148.78

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Solution

The fourth proportional to 685,498.47, 946,094.67 and 391,148.78 is: 539,846.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,498.47 : 946,094.67 = 391,148.78 : x
  2. Step 2: Convert to fraction form
    685,498.47/946,094.67 = 391,148.78/x
  3. Step 3: Cross multiply
    685,498.47x = 946,094.67 × 391,148.78
  4. Step 4: Simplify right side
    685,498.47x = 370,063,772,182.40
  5. Step 5: Solve for x
    x = 370,063,772,182.40/685,498.47
  6. Step 6: Final answer
    x = 539,846.24

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Double scale
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Similar ratio
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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.