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Finding the Fourth Proportional to 318,955.40, 478,433.10 and 141,808.40

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Solution

The fourth proportional to 318,955.40, 478,433.10 and 141,808.40 is: 212,712.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,955.40 : 478,433.10 = 141,808.40 : x
  2. Step 2: Convert to fraction form
    318,955.40/478,433.10 = 141,808.40/x
  3. Step 3: Cross multiply
    318,955.40x = 478,433.10 × 141,808.40
  4. Step 4: Simplify right side
    318,955.40x = 67,845,832,418.04
  5. Step 5: Solve for x
    x = 67,845,832,418.04/318,955.40
  6. Step 6: Final answer
    x = 212,712.60

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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.