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Finding the Fourth Proportional to 708,077.70, 977,151.60 and 421,609.86

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Solution

The fourth proportional to 708,077.70, 977,151.60 and 421,609.86 is: 581,824.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,077.70 : 977,151.60 = 421,609.86 : x
  2. Step 2: Convert to fraction form
    708,077.70/977,151.60 = 421,609.86/x
  3. Step 3: Cross multiply
    708,077.70x = 977,151.60 × 421,609.86
  4. Step 4: Simplify right side
    708,077.70x = 411,976,749,274.78
  5. Step 5: Solve for x
    x = 411,976,749,274.78/708,077.70
  6. Step 6: Final answer
    x = 581,824.21

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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.