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Finding the Fourth Proportional to 347,420.60, 521,303.70 and 137,065.40

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Solution

The fourth proportional to 347,420.60, 521,303.70 and 137,065.40 is: 205,666.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,420.60 : 521,303.70 = 137,065.40 : x
  2. Step 2: Convert to fraction form
    347,420.60/521,303.70 = 137,065.40/x
  3. Step 3: Cross multiply
    347,420.60x = 521,303.70 × 137,065.40
  4. Step 4: Simplify right side
    347,420.60x = 71,452,700,161.98
  5. Step 5: Solve for x
    x = 71,452,700,161.98/347,420.60
  6. Step 6: Final answer
    x = 205,666.27

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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.