Home / 638,444.90-881,097.70-390,193.56

Finding the Fourth Proportional to 638,444.90, 881,097.70 and 390,193.56

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Solution

The fourth proportional to 638,444.90, 881,097.70 and 390,193.56 is: 538,493.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,444.90 : 881,097.70 = 390,193.56 : x
  2. Step 2: Convert to fraction form
    638,444.90/881,097.70 = 390,193.56/x
  3. Step 3: Cross multiply
    638,444.90x = 881,097.70 × 390,193.56
  4. Step 4: Simplify right side
    638,444.90x = 343,798,648,270.81
  5. Step 5: Solve for x
    x = 343,798,648,270.81/638,444.90
  6. Step 6: Final answer
    x = 538,493.84

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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.