Home / 390,578.15-539,008.02-218,490.41

Finding the Fourth Proportional to 390,578.15, 539,008.02 and 218,490.41

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Solution

The fourth proportional to 390,578.15, 539,008.02 and 218,490.41 is: 301,522.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,578.15 : 539,008.02 = 218,490.41 : x
  2. Step 2: Convert to fraction form
    390,578.15/539,008.02 = 218,490.41/x
  3. Step 3: Cross multiply
    390,578.15x = 539,008.02 × 218,490.41
  4. Step 4: Simplify right side
    390,578.15x = 117,768,084,630.61
  5. Step 5: Solve for x
    x = 117,768,084,630.61/390,578.15
  6. Step 6: Final answer
    x = 301,522.46

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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.