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Finding the Fourth Proportional to 708,447.17, 977,666.81 and 386,156.58

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Solution

The fourth proportional to 708,447.17, 977,666.81 and 386,156.58 is: 532,901.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,447.17 : 977,666.81 = 386,156.58 : x
  2. Step 2: Convert to fraction form
    708,447.17/977,666.81 = 386,156.58/x
  3. Step 3: Cross multiply
    708,447.17x = 977,666.81 × 386,156.58
  4. Step 4: Simplify right side
    708,447.17x = 377,532,469,798.33
  5. Step 5: Solve for x
    x = 377,532,469,798.33/708,447.17
  6. Step 6: Final answer
    x = 532,901.38

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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.