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Finding the Fourth Proportional to 885,490.80, 1,328,063.40 and 286,306.80

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Solution

The fourth proportional to 885,490.80, 1,328,063.40 and 286,306.80 is: 429,404.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,490.80 : 1,328,063.40 = 286,306.80 : x
  2. Step 2: Convert to fraction form
    885,490.80/1,328,063.40 = 286,306.80/x
  3. Step 3: Cross multiply
    885,490.80x = 1,328,063.40 × 286,306.80
  4. Step 4: Simplify right side
    885,490.80x = 380,233,582,251.12
  5. Step 5: Solve for x
    x = 380,233,582,251.12/885,490.80
  6. Step 6: Final answer
    x = 429,404.33

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Double scale
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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.