Home / 431,118,630.40-646,677,945.60-212,873,526.40

Finding the Fourth Proportional to 431,118,630.40, 646,677,945.60 and 212,873,526.40

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Solution

The fourth proportional to 431,118,630.40, 646,677,945.60 and 212,873,526.40 is: 319,310,289.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,118,630.40 : 646,677,945.60 = 212,873,526.40 : x
  2. Step 2: Convert to fraction form
    431,118,630.40/646,677,945.60 = 212,873,526.40/x
  3. Step 3: Cross multiply
    431,118,630.40x = 646,677,945.60 × 212,873,526.40
  4. Step 4: Simplify right side
    431,118,630.40x = 137,660,614,724,979,376
  5. Step 5: Solve for x
    x = 137,660,614,724,979,376/431,118,630.40
  6. Step 6: Final answer
    x = 319,310,289.60

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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.