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Finding the Fourth Proportional to 724,102.79, 999,308.75 and 401,813.64

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Solution

The fourth proportional to 724,102.79, 999,308.75 and 401,813.64 is: 554,528.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,102.79 : 999,308.75 = 401,813.64 : x
  2. Step 2: Convert to fraction form
    724,102.79/999,308.75 = 401,813.64/x
  3. Step 3: Cross multiply
    724,102.79x = 999,308.75 × 401,813.64
  4. Step 4: Simplify right side
    724,102.79x = 401,535,884,312.28
  5. Step 5: Solve for x
    x = 401,535,884,312.28/724,102.79
  6. Step 6: Final answer
    x = 554,528.85

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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.