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Finding the Fourth Proportional to 604,872.20, 907,308.30 and 415,915.40

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Solution

The fourth proportional to 604,872.20, 907,308.30 and 415,915.40 is: 623,873.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,872.20 : 907,308.30 = 415,915.40 : x
  2. Step 2: Convert to fraction form
    604,872.20/907,308.30 = 415,915.40/x
  3. Step 3: Cross multiply
    604,872.20x = 907,308.30 × 415,915.40
  4. Step 4: Simplify right side
    604,872.20x = 377,363,494,517.82
  5. Step 5: Solve for x
    x = 377,363,494,517.82/604,872.20
  6. Step 6: Final answer
    x = 623,873.10

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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.