Home / 687,070.80-1,030,606.20-406,443.60

Finding the Fourth Proportional to 687,070.80, 1,030,606.20 and 406,443.60

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Solution

The fourth proportional to 687,070.80, 1,030,606.20 and 406,443.60 is: 609,665.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,070.80 : 1,030,606.20 = 406,443.60 : x
  2. Step 2: Convert to fraction form
    687,070.80/1,030,606.20 = 406,443.60/x
  3. Step 3: Cross multiply
    687,070.80x = 1,030,606.20 × 406,443.60
  4. Step 4: Simplify right side
    687,070.80x = 418,883,294,110.32
  5. Step 5: Solve for x
    x = 418,883,294,110.32/687,070.80
  6. Step 6: Final answer
    x = 609,665.40

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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.