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Finding the Fourth Proportional to 318,953.40, 478,430.10 and 141,806.40

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Solution

The fourth proportional to 318,953.40, 478,430.10 and 141,806.40 is: 212,709.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,953.40 : 478,430.10 = 141,806.40 : x
  2. Step 2: Convert to fraction form
    318,953.40/478,430.10 = 141,806.40/x
  3. Step 3: Cross multiply
    318,953.40x = 478,430.10 × 141,806.40
  4. Step 4: Simplify right side
    318,953.40x = 67,844,450,132.64
  5. Step 5: Solve for x
    x = 67,844,450,132.64/318,953.40
  6. Step 6: Final answer
    x = 212,709.60

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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.