Home / 663,923.28-916,202.24-388,307.76

Finding the Fourth Proportional to 663,923.28, 916,202.24 and 388,307.76

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Solution

The fourth proportional to 663,923.28, 916,202.24 and 388,307.76 is: 535,857.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,923.28 : 916,202.24 = 388,307.76 : x
  2. Step 2: Convert to fraction form
    663,923.28/916,202.24 = 388,307.76/x
  3. Step 3: Cross multiply
    663,923.28x = 916,202.24 × 388,307.76
  4. Step 4: Simplify right side
    663,923.28x = 355,768,439,521.38
  5. Step 5: Solve for x
    x = 355,768,439,521.38/663,923.28
  6. Step 6: Final answer
    x = 535,857.76

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.