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Finding the Fourth Proportional to 642,419.60, 963,629.40 and 576,064.40

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Solution

The fourth proportional to 642,419.60, 963,629.40 and 576,064.40 is: 864,096.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,419.60 : 963,629.40 = 576,064.40 : x
  2. Step 2: Convert to fraction form
    642,419.60/963,629.40 = 576,064.40/x
  3. Step 3: Cross multiply
    642,419.60x = 963,629.40 × 576,064.40
  4. Step 4: Simplify right side
    642,419.60x = 555,112,592,133.36
  5. Step 5: Solve for x
    x = 555,112,592,133.36/642,419.60
  6. Step 6: Final answer
    x = 864,096.60

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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.