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Finding the Fourth Proportional to 686,347,154.69, 934,487,849.32 and 684,167,914.44

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Solution

The fourth proportional to 686,347,154.69, 934,487,849.32 and 684,167,914.44 is: 931,520,730.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,347,154.69 : 934,487,849.32 = 684,167,914.44 : x
  2. Step 2: Convert to fraction form
    686,347,154.69/934,487,849.32 = 684,167,914.44/x
  3. Step 3: Cross multiply
    686,347,154.69x = 934,487,849.32 × 684,167,914.44
  4. Step 4: Simplify right side
    686,347,154.69x = 639,346,602,937,074,944
  5. Step 5: Solve for x
    x = 639,346,602,937,074,944/686,347,154.69
  6. Step 6: Final answer
    x = 931,520,730.54

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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.