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Finding the Fourth Proportional to 523,312.80, 784,969.20 and 383,344.80

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Solution

The fourth proportional to 523,312.80, 784,969.20 and 383,344.80 is: 575,017.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,312.80 : 784,969.20 = 383,344.80 : x
  2. Step 2: Convert to fraction form
    523,312.80/784,969.20 = 383,344.80/x
  3. Step 3: Cross multiply
    523,312.80x = 784,969.20 × 383,344.80
  4. Step 4: Simplify right side
    523,312.80x = 300,913,860,980.16
  5. Step 5: Solve for x
    x = 300,913,860,980.16/523,312.80
  6. Step 6: Final answer
    x = 575,017.20

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Double scale
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Similar ratio
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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.