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Finding the Fourth Proportional to 392,005.60, 587,133.60 and 302,970.40

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Solution

The fourth proportional to 392,005.60, 587,133.60 and 302,970.40 is: 453,779.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,005.60 : 587,133.60 = 302,970.40 : x
  2. Step 2: Convert to fraction form
    392,005.60/587,133.60 = 302,970.40/x
  3. Step 3: Cross multiply
    392,005.60x = 587,133.60 × 302,970.40
  4. Step 4: Simplify right side
    392,005.60x = 177,884,101,645.44
  5. Step 5: Solve for x
    x = 177,884,101,645.44/392,005.60
  6. Step 6: Final answer
    x = 453,779.49

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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.