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Finding the Fourth Proportional to 402,720.40, 604,080.60 and 192,768.40

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Solution

The fourth proportional to 402,720.40, 604,080.60 and 192,768.40 is: 289,152.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,720.40 : 604,080.60 = 192,768.40 : x
  2. Step 2: Convert to fraction form
    402,720.40/604,080.60 = 192,768.40/x
  3. Step 3: Cross multiply
    402,720.40x = 604,080.60 × 192,768.40
  4. Step 4: Simplify right side
    402,720.40x = 116,447,650,733.04
  5. Step 5: Solve for x
    x = 116,447,650,733.04/402,720.40
  6. Step 6: Final answer
    x = 289,152.60

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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.