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Finding the Fourth Proportional to 634,574.92, 875,218.48 and 392,991.64

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Solution

The fourth proportional to 634,574.92, 875,218.48 and 392,991.64 is: 542,021.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,574.92 : 875,218.48 = 392,991.64 : x
  2. Step 2: Convert to fraction form
    634,574.92/875,218.48 = 392,991.64/x
  3. Step 3: Cross multiply
    634,574.92x = 875,218.48 × 392,991.64
  4. Step 4: Simplify right side
    634,574.92x = 343,953,545,813.51
  5. Step 5: Solve for x
    x = 343,953,545,813.51/634,574.92
  6. Step 6: Final answer
    x = 542,021.97

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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.