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Finding the Fourth Proportional to 579,423.60, 867,385.80 and 509,439.60

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Solution

The fourth proportional to 579,423.60, 867,385.80 and 509,439.60 is: 762,621.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,423.60 : 867,385.80 = 509,439.60 : x
  2. Step 2: Convert to fraction form
    579,423.60/867,385.80 = 509,439.60/x
  3. Step 3: Cross multiply
    579,423.60x = 867,385.80 × 509,439.60
  4. Step 4: Simplify right side
    579,423.60x = 441,880,674,997.68
  5. Step 5: Solve for x
    x = 441,880,674,997.68/579,423.60
  6. Step 6: Final answer
    x = 762,621.12

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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.