Home / 638,868.35-881,639.06-366,988.90

Finding the Fourth Proportional to 638,868.35, 881,639.06 and 366,988.90

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Solution

The fourth proportional to 638,868.35, 881,639.06 and 366,988.90 is: 506,445.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,868.35 : 881,639.06 = 366,988.90 : x
  2. Step 2: Convert to fraction form
    638,868.35/881,639.06 = 366,988.90/x
  3. Step 3: Cross multiply
    638,868.35x = 881,639.06 × 366,988.90
  4. Step 4: Simplify right side
    638,868.35x = 323,551,748,826.43
  5. Step 5: Solve for x
    x = 323,551,748,826.43/638,868.35
  6. Step 6: Final answer
    x = 506,445.11

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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.