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Finding the Fourth Proportional to 871,728.40, 1,307,592.60 and 310,560.40

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Solution

The fourth proportional to 871,728.40, 1,307,592.60 and 310,560.40 is: 465,840.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,728.40 : 1,307,592.60 = 310,560.40 : x
  2. Step 2: Convert to fraction form
    871,728.40/1,307,592.60 = 310,560.40/x
  3. Step 3: Cross multiply
    871,728.40x = 1,307,592.60 × 310,560.40
  4. Step 4: Simplify right side
    871,728.40x = 406,086,480,893.04
  5. Step 5: Solve for x
    x = 406,086,480,893.04/871,728.40
  6. Step 6: Final answer
    x = 465,840.60

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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.