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Finding the Fourth Proportional to 642,505.60, 963,758.40 and 310,729.60

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Solution

The fourth proportional to 642,505.60, 963,758.40 and 310,729.60 is: 466,094.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,505.60 : 963,758.40 = 310,729.60 : x
  2. Step 2: Convert to fraction form
    642,505.60/963,758.40 = 310,729.60/x
  3. Step 3: Cross multiply
    642,505.60x = 963,758.40 × 310,729.60
  4. Step 4: Simplify right side
    642,505.60x = 299,468,262,128.64
  5. Step 5: Solve for x
    x = 299,468,262,128.64/642,505.60
  6. Step 6: Final answer
    x = 466,094.40

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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.