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Finding the Fourth Proportional to 613,415.40, 920,166.30 and 347,303.40

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Solution

The fourth proportional to 613,415.40, 920,166.30 and 347,303.40 is: 520,979.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,415.40 : 920,166.30 = 347,303.40 : x
  2. Step 2: Convert to fraction form
    613,415.40/920,166.30 = 347,303.40/x
  3. Step 3: Cross multiply
    613,415.40x = 920,166.30 × 347,303.40
  4. Step 4: Simplify right side
    613,415.40x = 319,576,884,555.42
  5. Step 5: Solve for x
    x = 319,576,884,555.42/613,415.40
  6. Step 6: Final answer
    x = 520,979.56

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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.