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Finding the Fourth Proportional to 402,520.40, 603,780.60 and 362,430.80

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Solution

The fourth proportional to 402,520.40, 603,780.60 and 362,430.80 is: 543,646.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,520.40 : 603,780.60 = 362,430.80 : x
  2. Step 2: Convert to fraction form
    402,520.40/603,780.60 = 362,430.80/x
  3. Step 3: Cross multiply
    402,520.40x = 603,780.60 × 362,430.80
  4. Step 4: Simplify right side
    402,520.40x = 218,828,685,882.48
  5. Step 5: Solve for x
    x = 218,828,685,882.48/402,520.40
  6. Step 6: Final answer
    x = 543,646.20

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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.