Home / 721,869.84-996,148.08-399,557.16

Finding the Fourth Proportional to 721,869.84, 996,148.08 and 399,557.16

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Solution

The fourth proportional to 721,869.84, 996,148.08 and 399,557.16 is: 551,371.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,869.84 : 996,148.08 = 399,557.16 : x
  2. Step 2: Convert to fraction form
    721,869.84/996,148.08 = 399,557.16/x
  3. Step 3: Cross multiply
    721,869.84x = 996,148.08 × 399,557.16
  4. Step 4: Simplify right side
    721,869.84x = 398,018,097,784.25
  5. Step 5: Solve for x
    x = 398,018,097,784.25/721,869.84
  6. Step 6: Final answer
    x = 551,371.00

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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.