Home / 687,000.80-1,030,598.40-213,636.80

Finding the Fourth Proportional to 687,000.80, 1,030,598.40 and 213,636.80

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Solution

The fourth proportional to 687,000.80, 1,030,598.40 and 213,636.80 is: 320,485.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,000.80 : 1,030,598.40 = 213,636.80 : x
  2. Step 2: Convert to fraction form
    687,000.80/1,030,598.40 = 213,636.80/x
  3. Step 3: Cross multiply
    687,000.80x = 1,030,598.40 × 213,636.80
  4. Step 4: Simplify right side
    687,000.80x = 220,173,744,261.12
  5. Step 5: Solve for x
    x = 220,173,744,261.12/687,000.80
  6. Step 6: Final answer
    x = 320,485.43

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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.