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Finding the Fourth Proportional to 577,211.40, 865,817.10 and 417,779.10

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Solution

The fourth proportional to 577,211.40, 865,817.10 and 417,779.10 is: 626,668.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,211.40 : 865,817.10 = 417,779.10 : x
  2. Step 2: Convert to fraction form
    577,211.40/865,817.10 = 417,779.10/x
  3. Step 3: Cross multiply
    577,211.40x = 865,817.10 × 417,779.10
  4. Step 4: Simplify right side
    577,211.40x = 361,720,288,802.61
  5. Step 5: Solve for x
    x = 361,720,288,802.61/577,211.40
  6. Step 6: Final answer
    x = 626,668.65

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Double scale
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Similar ratio
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1.5x scale

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.