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Finding the Fourth Proportional to 347,842.20, 520,985.70 and 340,066.20

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Solution

The fourth proportional to 347,842.20, 520,985.70 and 340,066.20 is: 509,339.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,842.20 : 520,985.70 = 340,066.20 : x
  2. Step 2: Convert to fraction form
    347,842.20/520,985.70 = 340,066.20/x
  3. Step 3: Cross multiply
    347,842.20x = 520,985.70 × 340,066.20
  4. Step 4: Simplify right side
    347,842.20x = 177,169,627,253.34
  5. Step 5: Solve for x
    x = 177,169,627,253.34/347,842.20
  6. Step 6: Final answer
    x = 509,339.08

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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.