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Finding the Fourth Proportional to 661,238.40, 912,509.58 and 359,432.40

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Solution

The fourth proportional to 661,238.40, 912,509.58 and 359,432.40 is: 496,017.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,238.40 : 912,509.58 = 359,432.40 : x
  2. Step 2: Convert to fraction form
    661,238.40/912,509.58 = 359,432.40/x
  3. Step 3: Cross multiply
    661,238.40x = 912,509.58 × 359,432.40
  4. Step 4: Simplify right side
    661,238.40x = 327,985,508,362.39
  5. Step 5: Solve for x
    x = 327,985,508,362.39/661,238.40
  6. Step 6: Final answer
    x = 496,017.03

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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.