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Finding the Fourth Proportional to 378,021.74, 521,870.24 and 291,795.21

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Solution

The fourth proportional to 378,021.74, 521,870.24 and 291,795.21 is: 402,831.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,021.74 : 521,870.24 = 291,795.21 : x
  2. Step 2: Convert to fraction form
    378,021.74/521,870.24 = 291,795.21/x
  3. Step 3: Cross multiply
    378,021.74x = 521,870.24 × 291,795.21
  4. Step 4: Simplify right side
    378,021.74x = 152,279,237,003.04
  5. Step 5: Solve for x
    x = 152,279,237,003.04/378,021.74
  6. Step 6: Final answer
    x = 402,831.96

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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.