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Finding the Fourth Proportional to 342,220.80, 512,985.60 and 155,366.40

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Solution

The fourth proportional to 342,220.80, 512,985.60 and 155,366.40 is: 232,892.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,220.80 : 512,985.60 = 155,366.40 : x
  2. Step 2: Convert to fraction form
    342,220.80/512,985.60 = 155,366.40/x
  3. Step 3: Cross multiply
    342,220.80x = 512,985.60 × 155,366.40
  4. Step 4: Simplify right side
    342,220.80x = 79,700,725,923.84
  5. Step 5: Solve for x
    x = 79,700,725,923.84/342,220.80
  6. Step 6: Final answer
    x = 232,892.70

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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.