Home / 398,278.12-549,254.58-290,677.72

Finding the Fourth Proportional to 398,278.12, 549,254.58 and 290,677.72

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Solution

The fourth proportional to 398,278.12, 549,254.58 and 290,677.72 is: 400,865.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,278.12 : 549,254.58 = 290,677.72 : x
  2. Step 2: Convert to fraction form
    398,278.12/549,254.58 = 290,677.72/x
  3. Step 3: Cross multiply
    398,278.12x = 549,254.58 × 290,677.72
  4. Step 4: Simplify right side
    398,278.12x = 159,656,069,013.96
  5. Step 5: Solve for x
    x = 159,656,069,013.96/398,278.12
  6. Step 6: Final answer
    x = 400,865.78

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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.