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Finding the Fourth Proportional to 613,275.40, 919,913.10 and 424,318.60

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Solution

The fourth proportional to 613,275.40, 919,913.10 and 424,318.60 is: 636,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,275.40 : 919,913.10 = 424,318.60 : x
  2. Step 2: Convert to fraction form
    613,275.40/919,913.10 = 424,318.60/x
  3. Step 3: Cross multiply
    613,275.40x = 919,913.10 × 424,318.60
  4. Step 4: Simplify right side
    613,275.40x = 390,336,238,713.66
  5. Step 5: Solve for x
    x = 390,336,238,713.66/613,275.40
  6. Step 6: Final answer
    x = 636,477.90

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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.