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Finding the Fourth Proportional to 871,999.60, 1,307,308.20 and 478,015.60

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Solution

The fourth proportional to 871,999.60, 1,307,308.20 and 478,015.60 is: 716,644.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,999.60 : 1,307,308.20 = 478,015.60 : x
  2. Step 2: Convert to fraction form
    871,999.60/1,307,308.20 = 478,015.60/x
  3. Step 3: Cross multiply
    871,999.60x = 1,307,308.20 × 478,015.60
  4. Step 4: Simplify right side
    871,999.60x = 624,913,713,607.92
  5. Step 5: Solve for x
    x = 624,913,713,607.92/871,999.60
  6. Step 6: Final answer
    x = 716,644.50

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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.