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Finding the Fourth Proportional to 42,412.80, 63,619.20 and 40,274.40

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Solution

The fourth proportional to 42,412.80, 63,619.20 and 40,274.40 is: 60,411.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,412.80 : 63,619.20 = 40,274.40 : x
  2. Step 2: Convert to fraction form
    42,412.80/63,619.20 = 40,274.40/x
  3. Step 3: Cross multiply
    42,412.80x = 63,619.20 × 40,274.40
  4. Step 4: Simplify right side
    42,412.80x = 2,562,225,108.48
  5. Step 5: Solve for x
    x = 2,562,225,108.48/42,412.80
  6. Step 6: Final answer
    x = 60,411.60

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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.