Home / 393,437.04-542,913.48-223,638

Finding the Fourth Proportional to 393,437.04, 542,913.48 and 223,638

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Solution

The fourth proportional to 393,437.04, 542,913.48 and 223,638 is: 308,603.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,437.04 : 542,913.48 = 223,638 : x
  2. Step 2: Convert to fraction form
    393,437.04/542,913.48 = 223,638/x
  3. Step 3: Cross multiply
    393,437.04x = 542,913.48 × 223,638
  4. Step 4: Simplify right side
    393,437.04x = 121,416,084,840.24
  5. Step 5: Solve for x
    x = 121,416,084,840.24/393,437.04
  6. Step 6: Final answer
    x = 308,603.59

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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.