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Finding the Fourth Proportional to 545,421.40, 818,132.10 and 171,444.40

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Solution

The fourth proportional to 545,421.40, 818,132.10 and 171,444.40 is: 257,166.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,421.40 : 818,132.10 = 171,444.40 : x
  2. Step 2: Convert to fraction form
    545,421.40/818,132.10 = 171,444.40/x
  3. Step 3: Cross multiply
    545,421.40x = 818,132.10 × 171,444.40
  4. Step 4: Simplify right side
    545,421.40x = 140,264,167,005.24
  5. Step 5: Solve for x
    x = 140,264,167,005.24/545,421.40
  6. Step 6: Final answer
    x = 257,166.60

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Double scale
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Similar ratio
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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.