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Finding the Fourth Proportional to 353,655.72, 530,430.93 and 128,963.34

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Solution

The fourth proportional to 353,655.72, 530,430.93 and 128,963.34 is: 193,425.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,655.72 : 530,430.93 = 128,963.34 : x
  2. Step 2: Convert to fraction form
    353,655.72/530,430.93 = 128,963.34/x
  3. Step 3: Cross multiply
    353,655.72x = 530,430.93 × 128,963.34
  4. Step 4: Simplify right side
    353,655.72x = 68,406,144,372.11
  5. Step 5: Solve for x
    x = 68,406,144,372.11/353,655.72
  6. Step 6: Final answer
    x = 193,425.81

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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.