Home / 402,740.10-605,422.35-285,225.30

Finding the Fourth Proportional to 402,740.10, 605,422.35 and 285,225.30

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Solution

The fourth proportional to 402,740.10, 605,422.35 and 285,225.30 is: 428,767.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,740.10 : 605,422.35 = 285,225.30 : x
  2. Step 2: Convert to fraction form
    402,740.10/605,422.35 = 285,225.30/x
  3. Step 3: Cross multiply
    402,740.10x = 605,422.35 × 285,225.30
  4. Step 4: Simplify right side
    402,740.10x = 172,681,771,405.46
  5. Step 5: Solve for x
    x = 172,681,771,405.46/402,740.10
  6. Step 6: Final answer
    x = 428,767.27

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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.