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Finding the Fourth Proportional to 613,374.40, 920,061.60 and 485,434.90

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Solution

The fourth proportional to 613,374.40, 920,061.60 and 485,434.90 is: 728,152.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,374.40 : 920,061.60 = 485,434.90 : x
  2. Step 2: Convert to fraction form
    613,374.40/920,061.60 = 485,434.90/x
  3. Step 3: Cross multiply
    613,374.40x = 920,061.60 × 485,434.90
  4. Step 4: Simplify right side
    613,374.40x = 446,630,010,789.84
  5. Step 5: Solve for x
    x = 446,630,010,789.84/613,374.40
  6. Step 6: Final answer
    x = 728,152.35

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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.