Home / 283,636.80-391,421.16-156,312.72

Finding the Fourth Proportional to 283,636.80, 391,421.16 and 156,312.72

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Solution

The fourth proportional to 283,636.80, 391,421.16 and 156,312.72 is: 215,712.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,636.80 : 391,421.16 = 156,312.72 : x
  2. Step 2: Convert to fraction form
    283,636.80/391,421.16 = 156,312.72/x
  3. Step 3: Cross multiply
    283,636.80x = 391,421.16 × 156,312.72
  4. Step 4: Simplify right side
    283,636.80x = 61,184,106,185.16
  5. Step 5: Solve for x
    x = 61,184,106,185.16/283,636.80
  6. Step 6: Final answer
    x = 215,712.86

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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.