Home / 687,121.40-1,030,202.10-406,494.20

Finding the Fourth Proportional to 687,121.40, 1,030,202.10 and 406,494.20

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Solution

The fourth proportional to 687,121.40, 1,030,202.10 and 406,494.20 is: 609,457.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,121.40 : 1,030,202.10 = 406,494.20 : x
  2. Step 2: Convert to fraction form
    687,121.40/1,030,202.10 = 406,494.20/x
  3. Step 3: Cross multiply
    687,121.40x = 1,030,202.10 × 406,494.20
  4. Step 4: Simplify right side
    687,121.40x = 418,771,178,477.82
  5. Step 5: Solve for x
    x = 418,771,178,477.82/687,121.40
  6. Step 6: Final answer
    x = 609,457.34

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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.