Home / 928,211.64-1,280,921.76-520,379.88

Finding the Fourth Proportional to 928,211.64, 1,280,921.76 and 520,379.88

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Solution

The fourth proportional to 928,211.64, 1,280,921.76 and 520,379.88 is: 718,118.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,211.64 : 1,280,921.76 = 520,379.88 : x
  2. Step 2: Convert to fraction form
    928,211.64/1,280,921.76 = 520,379.88/x
  3. Step 3: Cross multiply
    928,211.64x = 1,280,921.76 × 520,379.88
  4. Step 4: Simplify right side
    928,211.64x = 666,565,911,758.19
  5. Step 5: Solve for x
    x = 666,565,911,758.19/928,211.64
  6. Step 6: Final answer
    x = 718,118.46

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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.