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Finding the Fourth Proportional to 714,714.69, 986,299.43 and 392,421.95

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Solution

The fourth proportional to 714,714.69, 986,299.43 and 392,421.95 is: 541,538.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,714.69 : 986,299.43 = 392,421.95 : x
  2. Step 2: Convert to fraction form
    714,714.69/986,299.43 = 392,421.95/x
  3. Step 3: Cross multiply
    714,714.69x = 986,299.43 × 392,421.95
  4. Step 4: Simplify right side
    714,714.69x = 387,045,538,710.88
  5. Step 5: Solve for x
    x = 387,045,538,710.88/714,714.69
  6. Step 6: Final answer
    x = 541,538.52

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1.5x scale

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.