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Finding the Fourth Proportional to 666,466.80, 999,700.20 and 430,076.40

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Solution

The fourth proportional to 666,466.80, 999,700.20 and 430,076.40 is: 645,114.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,466.80 : 999,700.20 = 430,076.40 : x
  2. Step 2: Convert to fraction form
    666,466.80/999,700.20 = 430,076.40/x
  3. Step 3: Cross multiply
    666,466.80x = 999,700.20 × 430,076.40
  4. Step 4: Simplify right side
    666,466.80x = 429,947,463,095.28
  5. Step 5: Solve for x
    x = 429,947,463,095.28/666,466.80
  6. Step 6: Final answer
    x = 645,114.60

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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.