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Finding the Fourth Proportional to 659,915.20, 989,872.80 and 549,323.20

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Solution

The fourth proportional to 659,915.20, 989,872.80 and 549,323.20 is: 823,984.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,915.20 : 989,872.80 = 549,323.20 : x
  2. Step 2: Convert to fraction form
    659,915.20/989,872.80 = 549,323.20/x
  3. Step 3: Cross multiply
    659,915.20x = 989,872.80 × 549,323.20
  4. Step 4: Simplify right side
    659,915.20x = 543,760,094,088.96
  5. Step 5: Solve for x
    x = 543,760,094,088.96/659,915.20
  6. Step 6: Final answer
    x = 823,984.80

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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.