Home / 398,337,928.61-549,706,871.01-219,717,811.20

Finding the Fourth Proportional to 398,337,928.61, 549,706,871.01 and 219,717,811.20

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Solution

The fourth proportional to 398,337,928.61, 549,706,871.01 and 219,717,811.20 is: 303,210,871.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,337,928.61 : 549,706,871.01 = 219,717,811.20 : x
  2. Step 2: Convert to fraction form
    398,337,928.61/549,706,871.01 = 219,717,811.20/x
  3. Step 3: Cross multiply
    398,337,928.61x = 549,706,871.01 × 219,717,811.20
  4. Step 4: Simplify right side
    398,337,928.61x = 120,780,390,499,917,920
  5. Step 5: Solve for x
    x = 120,780,390,499,917,920/398,337,928.61
  6. Step 6: Final answer
    x = 303,210,871.54

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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.