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Finding the Fourth Proportional to 285,484.50, 428,210.55 and 85,800.87

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Solution

The fourth proportional to 285,484.50, 428,210.55 and 85,800.87 is: 128,696.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,484.50 : 428,210.55 = 85,800.87 : x
  2. Step 2: Convert to fraction form
    285,484.50/428,210.55 = 85,800.87/x
  3. Step 3: Cross multiply
    285,484.50x = 428,210.55 × 85,800.87
  4. Step 4: Simplify right side
    285,484.50x = 36,740,837,733.18
  5. Step 5: Solve for x
    x = 36,740,837,733.18/285,484.50
  6. Step 6: Final answer
    x = 128,696.44

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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.