Home / 639,009.68-881,918.89-406,459.26

Finding the Fourth Proportional to 639,009.68, 881,918.89 and 406,459.26

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Solution

The fourth proportional to 639,009.68, 881,918.89 and 406,459.26 is: 560,968.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,009.68 : 881,918.89 = 406,459.26 : x
  2. Step 2: Convert to fraction form
    639,009.68/881,918.89 = 406,459.26/x
  3. Step 3: Cross multiply
    639,009.68x = 881,918.89 × 406,459.26
  4. Step 4: Simplify right side
    639,009.68x = 358,464,099,409.42
  5. Step 5: Solve for x
    x = 358,464,099,409.42/639,009.68
  6. Step 6: Final answer
    x = 560,968.18

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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.