Home / 686,912.40-1,029,888.60-406,285.20

Finding the Fourth Proportional to 686,912.40, 1,029,888.60 and 406,285.20

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Solution

The fourth proportional to 686,912.40, 1,029,888.60 and 406,285.20 is: 609,143.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,912.40 : 1,029,888.60 = 406,285.20 : x
  2. Step 2: Convert to fraction form
    686,912.40/1,029,888.60 = 406,285.20/x
  3. Step 3: Cross multiply
    686,912.40x = 1,029,888.60 × 406,285.20
  4. Step 4: Simplify right side
    686,912.40x = 418,428,495,828.72
  5. Step 5: Solve for x
    x = 418,428,495,828.72/686,912.40
  6. Step 6: Final answer
    x = 609,143.90

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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.