Home / 853,907.76-1,178,438.28-491,386.80

Finding the Fourth Proportional to 853,907.76, 1,178,438.28 and 491,386.80

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Solution

The fourth proportional to 853,907.76, 1,178,438.28 and 491,386.80 is: 678,140.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,907.76 : 1,178,438.28 = 491,386.80 : x
  2. Step 2: Convert to fraction form
    853,907.76/1,178,438.28 = 491,386.80/x
  3. Step 3: Cross multiply
    853,907.76x = 1,178,438.28 × 491,386.80
  4. Step 4: Simplify right side
    853,907.76x = 579,069,015,406.70
  5. Step 5: Solve for x
    x = 579,069,015,406.70/853,907.76
  6. Step 6: Final answer
    x = 678,140.01

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Double scale
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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.