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Finding the Fourth Proportional to 708,644.79, 977,916.65 and 386,357.67

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Solution

The fourth proportional to 708,644.79, 977,916.65 and 386,357.67 is: 533,166.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,644.79 : 977,916.65 = 386,357.67 : x
  2. Step 2: Convert to fraction form
    708,644.79/977,916.65 = 386,357.67/x
  3. Step 3: Cross multiply
    708,644.79x = 977,916.65 × 386,357.67
  4. Step 4: Simplify right side
    708,644.79x = 377,825,596,416.42
  5. Step 5: Solve for x
    x = 377,825,596,416.42/708,644.79
  6. Step 6: Final answer
    x = 533,166.41

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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.