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Finding the Fourth Proportional to 666,467.80, 999,701.70 and 430,077.40

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Solution

The fourth proportional to 666,467.80, 999,701.70 and 430,077.40 is: 645,116.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,467.80 : 999,701.70 = 430,077.40 : x
  2. Step 2: Convert to fraction form
    666,467.80/999,701.70 = 430,077.40/x
  3. Step 3: Cross multiply
    666,467.80x = 999,701.70 × 430,077.40
  4. Step 4: Simplify right side
    666,467.80x = 429,949,107,911.58
  5. Step 5: Solve for x
    x = 429,949,107,911.58/666,467.80
  6. Step 6: Final answer
    x = 645,116.10

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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.