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Finding the Fourth Proportional to 354,017.40, 531,026.10 and 319,025.40

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Solution

The fourth proportional to 354,017.40, 531,026.10 and 319,025.40 is: 478,538.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,017.40 : 531,026.10 = 319,025.40 : x
  2. Step 2: Convert to fraction form
    354,017.40/531,026.10 = 319,025.40/x
  3. Step 3: Cross multiply
    354,017.40x = 531,026.10 × 319,025.40
  4. Step 4: Simplify right side
    354,017.40x = 169,410,813,962.94
  5. Step 5: Solve for x
    x = 169,410,813,962.94/354,017.40
  6. Step 6: Final answer
    x = 478,538.10

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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.