Home / 664,421.37-916,582.56-434,877.60

Finding the Fourth Proportional to 664,421.37, 916,582.56 and 434,877.60

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Solution

The fourth proportional to 664,421.37, 916,582.56 and 434,877.60 is: 599,922.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,421.37 : 916,582.56 = 434,877.60 : x
  2. Step 2: Convert to fraction form
    664,421.37/916,582.56 = 434,877.60/x
  3. Step 3: Cross multiply
    664,421.37x = 916,582.56 × 434,877.60
  4. Step 4: Simplify right side
    664,421.37x = 398,601,223,894.66
  5. Step 5: Solve for x
    x = 398,601,223,894.66/664,421.37
  6. Step 6: Final answer
    x = 599,922.34

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Double scale
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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.