Home / 386,939.96-534,001.04-257,656.76

Finding the Fourth Proportional to 386,939.96, 534,001.04 and 257,656.76

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Solution

The fourth proportional to 386,939.96, 534,001.04 and 257,656.76 is: 355,582.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,939.96 : 534,001.04 = 257,656.76 : x
  2. Step 2: Convert to fraction form
    386,939.96/534,001.04 = 257,656.76/x
  3. Step 3: Cross multiply
    386,939.96x = 534,001.04 × 257,656.76
  4. Step 4: Simplify right side
    386,939.96x = 137,588,977,803.03
  5. Step 5: Solve for x
    x = 137,588,977,803.03/386,939.96
  6. Step 6: Final answer
    x = 355,582.24

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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.