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Finding the Fourth Proportional to 585,501.21, 807,680.00 and 356,128.65

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Solution

The fourth proportional to 585,501.21, 807,680.00 and 356,128.65 is: 491,267.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,501.21 : 807,680.00 = 356,128.65 : x
  2. Step 2: Convert to fraction form
    585,501.21/807,680.00 = 356,128.65/x
  3. Step 3: Cross multiply
    585,501.21x = 807,680.00 × 356,128.65
  4. Step 4: Simplify right side
    585,501.21x = 287,637,988,671.93
  5. Step 5: Solve for x
    x = 287,637,988,671.93/585,501.21
  6. Step 6: Final answer
    x = 491,267.97

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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.