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Finding the Fourth Proportional to 455,428.90, 683,143.35 and 402,940.90

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Solution

The fourth proportional to 455,428.90, 683,143.35 and 402,940.90 is: 604,411.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,428.90 : 683,143.35 = 402,940.90 : x
  2. Step 2: Convert to fraction form
    455,428.90/683,143.35 = 402,940.90/x
  3. Step 3: Cross multiply
    455,428.90x = 683,143.35 × 402,940.90
  4. Step 4: Simplify right side
    455,428.90x = 275,266,396,278.02
  5. Step 5: Solve for x
    x = 275,266,396,278.02/455,428.90
  6. Step 6: Final answer
    x = 604,411.35

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Similar ratio
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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.