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Finding the Fourth Proportional to 718,840.76, 991,966.84 and 412,701.64

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Solution

The fourth proportional to 718,840.76, 991,966.84 and 412,701.64 is: 569,509.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,840.76 : 991,966.84 = 412,701.64 : x
  2. Step 2: Convert to fraction form
    718,840.76/991,966.84 = 412,701.64/x
  3. Step 3: Cross multiply
    718,840.76x = 991,966.84 × 412,701.64
  4. Step 4: Simplify right side
    718,840.76x = 409,386,338,181.95
  5. Step 5: Solve for x
    x = 409,386,338,181.95/718,840.76
  6. Step 6: Final answer
    x = 569,509.08

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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.