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Finding the Fourth Proportional to 721,925.02, 996,244.47 and 399,628.30

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Solution

The fourth proportional to 721,925.02, 996,244.47 and 399,628.30 is: 551,480.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,925.02 : 996,244.47 = 399,628.30 : x
  2. Step 2: Convert to fraction form
    721,925.02/996,244.47 = 399,628.30/x
  3. Step 3: Cross multiply
    721,925.02x = 996,244.47 × 399,628.30
  4. Step 4: Simplify right side
    721,925.02x = 398,127,483,930.50
  5. Step 5: Solve for x
    x = 398,127,483,930.50/721,925.02
  6. Step 6: Final answer
    x = 551,480.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.