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Finding the Fourth Proportional to 354,258.40, 531,387.60 and 319,266.40

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Solution

The fourth proportional to 354,258.40, 531,387.60 and 319,266.40 is: 478,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,258.40 : 531,387.60 = 319,266.40 : x
  2. Step 2: Convert to fraction form
    354,258.40/531,387.60 = 319,266.40/x
  3. Step 3: Cross multiply
    354,258.40x = 531,387.60 × 319,266.40
  4. Step 4: Simplify right side
    354,258.40x = 169,654,206,056.64
  5. Step 5: Solve for x
    x = 169,654,206,056.64/354,258.40
  6. Step 6: Final answer
    x = 478,899.60

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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.