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Finding the Fourth Proportional to 691,898.76, 954,798.64 and 405,609.53

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Solution

The fourth proportional to 691,898.76, 954,798.64 and 405,609.53 is: 559,728.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,898.76 : 954,798.64 = 405,609.53 : x
  2. Step 2: Convert to fraction form
    691,898.76/954,798.64 = 405,609.53/x
  3. Step 3: Cross multiply
    691,898.76x = 954,798.64 × 405,609.53
  4. Step 4: Simplify right side
    691,898.76x = 387,275,421,827.02
  5. Step 5: Solve for x
    x = 387,275,421,827.02/691,898.76
  6. Step 6: Final answer
    x = 559,728.45

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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.