Home / 638,985.39-881,802.72-352,505.40

Finding the Fourth Proportional to 638,985.39, 881,802.72 and 352,505.40

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Solution

The fourth proportional to 638,985.39, 881,802.72 and 352,505.40 is: 486,459.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,985.39 : 881,802.72 = 352,505.40 : x
  2. Step 2: Convert to fraction form
    638,985.39/881,802.72 = 352,505.40/x
  3. Step 3: Cross multiply
    638,985.39x = 881,802.72 × 352,505.40
  4. Step 4: Simplify right side
    638,985.39x = 310,840,220,534.69
  5. Step 5: Solve for x
    x = 310,840,220,534.69/638,985.39
  6. Step 6: Final answer
    x = 486,459.04

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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.