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Finding the Fourth Proportional to 455,430.40, 683,145.60 and 424,326.40

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Solution

The fourth proportional to 455,430.40, 683,145.60 and 424,326.40 is: 636,489.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,430.40 : 683,145.60 = 424,326.40 : x
  2. Step 2: Convert to fraction form
    455,430.40/683,145.60 = 424,326.40/x
  3. Step 3: Cross multiply
    455,430.40x = 683,145.60 × 424,326.40
  4. Step 4: Simplify right side
    455,430.40x = 289,876,713,123.84
  5. Step 5: Solve for x
    x = 289,876,713,123.84/455,430.40
  6. Step 6: Final answer
    x = 636,489.60

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Double scale
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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.