Home / 543,934.20-815,123.70-400,661.40

Finding the Fourth Proportional to 543,934.20, 815,123.70 and 400,661.40

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Solution

The fourth proportional to 543,934.20, 815,123.70 and 400,661.40 is: 600,419.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,934.20 : 815,123.70 = 400,661.40 : x
  2. Step 2: Convert to fraction form
    543,934.20/815,123.70 = 400,661.40/x
  3. Step 3: Cross multiply
    543,934.20x = 815,123.70 × 400,661.40
  4. Step 4: Simplify right side
    543,934.20x = 326,588,602,815.18
  5. Step 5: Solve for x
    x = 326,588,602,815.18/543,934.20
  6. Step 6: Final answer
    x = 600,419.32

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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.