Home / 687,065.80-1,030,598.70-406,438.60

Finding the Fourth Proportional to 687,065.80, 1,030,598.70 and 406,438.60

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Solution

The fourth proportional to 687,065.80, 1,030,598.70 and 406,438.60 is: 609,657.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,065.80 : 1,030,598.70 = 406,438.60 : x
  2. Step 2: Convert to fraction form
    687,065.80/1,030,598.70 = 406,438.60/x
  3. Step 3: Cross multiply
    687,065.80x = 1,030,598.70 × 406,438.60
  4. Step 4: Simplify right side
    687,065.80x = 418,875,092,789.82
  5. Step 5: Solve for x
    x = 418,875,092,789.82/687,065.80
  6. Step 6: Final answer
    x = 609,657.90

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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.