Home / 718,706.10-991,810.38-396,415.47

Finding the Fourth Proportional to 718,706.10, 991,810.38 and 396,415.47

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Solution

The fourth proportional to 718,706.10, 991,810.38 and 396,415.47 is: 547,051.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,706.10 : 991,810.38 = 396,415.47 : x
  2. Step 2: Convert to fraction form
    718,706.10/991,810.38 = 396,415.47/x
  3. Step 3: Cross multiply
    718,706.10x = 991,810.38 × 396,415.47
  4. Step 4: Simplify right side
    718,706.10x = 393,168,977,938.58
  5. Step 5: Solve for x
    x = 393,168,977,938.58/718,706.10
  6. Step 6: Final answer
    x = 547,051.12

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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.