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Finding the Fourth Proportional to 686,347,291.77, 934,488,035.76 and 684,168,051.57

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Solution

The fourth proportional to 686,347,291.77, 934,488,035.76 and 684,168,051.57 is: 931,520,917.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,347,291.77 : 934,488,035.76 = 684,168,051.57 : x
  2. Step 2: Convert to fraction form
    686,347,291.77/934,488,035.76 = 684,168,051.57/x
  3. Step 3: Cross multiply
    686,347,291.77x = 934,488,035.76 × 684,168,051.57
  4. Step 4: Simplify right side
    686,347,291.77x = 639,346,858,641,395,712
  5. Step 5: Solve for x
    x = 639,346,858,641,395,712/686,347,291.77
  6. Step 6: Final answer
    x = 931,520,917.05

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.