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Finding the Fourth Proportional to 347,312.80, 520,969.20 and 291,325.60

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Solution

The fourth proportional to 347,312.80, 520,969.20 and 291,325.60 is: 436,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,312.80 : 520,969.20 = 291,325.60 : x
  2. Step 2: Convert to fraction form
    347,312.80/520,969.20 = 291,325.60/x
  3. Step 3: Cross multiply
    347,312.80x = 520,969.20 × 291,325.60
  4. Step 4: Simplify right side
    347,312.80x = 151,771,664,771.52
  5. Step 5: Solve for x
    x = 151,771,664,771.52/347,312.80
  6. Step 6: Final answer
    x = 436,988.40

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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.