Home / 278,933.40-418,400.10-172,402.20

Finding the Fourth Proportional to 278,933.40, 418,400.10 and 172,402.20

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Solution

The fourth proportional to 278,933.40, 418,400.10 and 172,402.20 is: 258,603.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,933.40 : 418,400.10 = 172,402.20 : x
  2. Step 2: Convert to fraction form
    278,933.40/418,400.10 = 172,402.20/x
  3. Step 3: Cross multiply
    278,933.40x = 418,400.10 × 172,402.20
  4. Step 4: Simplify right side
    278,933.40x = 72,133,097,720.22
  5. Step 5: Solve for x
    x = 72,133,097,720.22/278,933.40
  6. Step 6: Final answer
    x = 258,603.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.