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Finding the Fourth Proportional to 440,185.70, 660,278.55 and 434,280.80

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Solution

The fourth proportional to 440,185.70, 660,278.55 and 434,280.80 is: 651,421.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,185.70 : 660,278.55 = 434,280.80 : x
  2. Step 2: Convert to fraction form
    440,185.70/660,278.55 = 434,280.80/x
  3. Step 3: Cross multiply
    440,185.70x = 660,278.55 × 434,280.80
  4. Step 4: Simplify right side
    440,185.70x = 286,746,296,916.84
  5. Step 5: Solve for x
    x = 286,746,296,916.84/440,185.70
  6. Step 6: Final answer
    x = 651,421.20

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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.