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Finding the Fourth Proportional to 665,871.62, 999,518.21 and 286,979.34

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Solution

The fourth proportional to 665,871.62, 999,518.21 and 286,979.34 is: 430,775.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,871.62 : 999,518.21 = 286,979.34 : x
  2. Step 2: Convert to fraction form
    665,871.62/999,518.21 = 286,979.34/x
  3. Step 3: Cross multiply
    665,871.62x = 999,518.21 × 286,979.34
  4. Step 4: Simplify right side
    665,871.62x = 286,841,076,223.78
  5. Step 5: Solve for x
    x = 286,841,076,223.78/665,871.62
  6. Step 6: Final answer
    x = 430,775.34

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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.