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Finding the Fourth Proportional to 455,510.20, 683,826.90 and 287,030.20

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Solution

The fourth proportional to 455,510.20, 683,826.90 and 287,030.20 is: 430,899.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,510.20 : 683,826.90 = 287,030.20 : x
  2. Step 2: Convert to fraction form
    455,510.20/683,826.90 = 287,030.20/x
  3. Step 3: Cross multiply
    455,510.20x = 683,826.90 × 287,030.20
  4. Step 4: Simplify right side
    455,510.20x = 196,278,971,872.38
  5. Step 5: Solve for x
    x = 196,278,971,872.38/455,510.20
  6. Step 6: Final answer
    x = 430,899.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.