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Finding the Fourth Proportional to 434,559.20, 651,838.80 and 418,812.80

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Solution

The fourth proportional to 434,559.20, 651,838.80 and 418,812.80 is: 628,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,559.20 : 651,838.80 = 418,812.80 : x
  2. Step 2: Convert to fraction form
    434,559.20/651,838.80 = 418,812.80/x
  3. Step 3: Cross multiply
    434,559.20x = 651,838.80 × 418,812.80
  4. Step 4: Simplify right side
    434,559.20x = 272,998,432,976.64
  5. Step 5: Solve for x
    x = 272,998,432,976.64/434,559.20
  6. Step 6: Final answer
    x = 628,219.20

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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.