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Finding the Fourth Proportional to 283,607.56, 391,386.90 and 156,291.40

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Solution

The fourth proportional to 283,607.56, 391,386.90 and 156,291.40 is: 215,686.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,607.56 : 391,386.90 = 156,291.40 : x
  2. Step 2: Convert to fraction form
    283,607.56/391,386.90 = 156,291.40/x
  3. Step 3: Cross multiply
    283,607.56x = 391,386.90 × 156,291.40
  4. Step 4: Simplify right side
    283,607.56x = 61,170,406,542.66
  5. Step 5: Solve for x
    x = 61,170,406,542.66/283,607.56
  6. Step 6: Final answer
    x = 215,686.80

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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.