Home / 398,282.12-549,260.10-290,681.72

Finding the Fourth Proportional to 398,282.12, 549,260.10 and 290,681.72

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Solution

The fourth proportional to 398,282.12, 549,260.10 and 290,681.72 is: 400,871.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,282.12 : 549,260.10 = 290,681.72 : x
  2. Step 2: Convert to fraction form
    398,282.12/549,260.10 = 290,681.72/x
  3. Step 3: Cross multiply
    398,282.12x = 549,260.10 × 290,681.72
  4. Step 4: Simplify right side
    398,282.12x = 159,659,870,595.37
  5. Step 5: Solve for x
    x = 159,659,870,595.37/398,282.12
  6. Step 6: Final answer
    x = 400,871.30

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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.