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Finding the Fourth Proportional to 390,846.67, 539,323.01 and 218,774.22

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Solution

The fourth proportional to 390,846.67, 539,323.01 and 218,774.22 is: 301,883.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,846.67 : 539,323.01 = 218,774.22 : x
  2. Step 2: Convert to fraction form
    390,846.67/539,323.01 = 218,774.22/x
  3. Step 3: Cross multiply
    390,846.67x = 539,323.01 × 218,774.22
  4. Step 4: Simplify right side
    390,846.67x = 117,989,968,544.87
  5. Step 5: Solve for x
    x = 117,989,968,544.87/390,846.67
  6. Step 6: Final answer
    x = 301,883.01

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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.