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Finding the Fourth Proportional to 515,127.70, 710,918.78 and 285,758.93

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Solution

The fourth proportional to 515,127.70, 710,918.78 and 285,758.93 is: 394,370.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,127.70 : 710,918.78 = 285,758.93 : x
  2. Step 2: Convert to fraction form
    515,127.70/710,918.78 = 285,758.93/x
  3. Step 3: Cross multiply
    515,127.70x = 710,918.78 × 285,758.93
  4. Step 4: Simplify right side
    515,127.70x = 203,151,388,460.91
  5. Step 5: Solve for x
    x = 203,151,388,460.91/515,127.70
  6. Step 6: Final answer
    x = 394,370.93

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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.