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Finding the Fourth Proportional to 559,115, 771,611.09 and 421,046.76

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Solution

The fourth proportional to 559,115, 771,611.09 and 421,046.76 is: 581,068.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,115 : 771,611.09 = 421,046.76 : x
  2. Step 2: Convert to fraction form
    559,115/771,611.09 = 421,046.76/x
  3. Step 3: Cross multiply
    559,115x = 771,611.09 × 421,046.76
  4. Step 4: Simplify right side
    559,115x = 324,884,349,424.57
  5. Step 5: Solve for x
    x = 324,884,349,424.57/559,115
  6. Step 6: Final answer
    x = 581,068.92

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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.