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Finding the Fourth Proportional to 378,298.32, 522,088.50 and 282,638.94

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Solution

The fourth proportional to 378,298.32, 522,088.50 and 282,638.94 is: 390,069.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,298.32 : 522,088.50 = 282,638.94 : x
  2. Step 2: Convert to fraction form
    378,298.32/522,088.50 = 282,638.94/x
  3. Step 3: Cross multiply
    378,298.32x = 522,088.50 × 282,638.94
  4. Step 4: Simplify right side
    378,298.32x = 147,562,540,226.19
  5. Step 5: Solve for x
    x = 147,562,540,226.19/378,298.32
  6. Step 6: Final answer
    x = 390,069.25

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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.