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Finding the Fourth Proportional to 604,915.20, 907,372.80 and 289,987.20

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Solution

The fourth proportional to 604,915.20, 907,372.80 and 289,987.20 is: 434,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,915.20 : 907,372.80 = 289,987.20 : x
  2. Step 2: Convert to fraction form
    604,915.20/907,372.80 = 289,987.20/x
  3. Step 3: Cross multiply
    604,915.20x = 907,372.80 × 289,987.20
  4. Step 4: Simplify right side
    604,915.20x = 263,126,497,628.16
  5. Step 5: Solve for x
    x = 263,126,497,628.16/604,915.20
  6. Step 6: Final answer
    x = 434,980.80

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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.