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Finding the Fourth Proportional to 642,776.58, 963,325.17 and 358,455.78

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Solution

The fourth proportional to 642,776.58, 963,325.17 and 358,455.78 is: 537,215.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,776.58 : 963,325.17 = 358,455.78 : x
  2. Step 2: Convert to fraction form
    642,776.58/963,325.17 = 358,455.78/x
  3. Step 3: Cross multiply
    642,776.58x = 963,325.17 × 358,455.78
  4. Step 4: Simplify right side
    642,776.58x = 345,309,475,205.98
  5. Step 5: Solve for x
    x = 345,309,475,205.98/642,776.58
  6. Step 6: Final answer
    x = 537,215.40

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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.