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Finding the Fourth Proportional to 665,872.62, 999,519.71 and 286,980.34

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Solution

The fourth proportional to 665,872.62, 999,519.71 and 286,980.34 is: 430,776.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,872.62 : 999,519.71 = 286,980.34 : x
  2. Step 2: Convert to fraction form
    665,872.62/999,519.71 = 286,980.34/x
  3. Step 3: Cross multiply
    665,872.62x = 999,519.71 × 286,980.34
  4. Step 4: Simplify right side
    665,872.62x = 286,842,506,212.50
  5. Step 5: Solve for x
    x = 286,842,506,212.50/665,872.62
  6. Step 6: Final answer
    x = 430,776.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.