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Finding the Fourth Proportional to 554,639.58, 765,400.12 and 299,990.16

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Solution

The fourth proportional to 554,639.58, 765,400.12 and 299,990.16 is: 413,985.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,639.58 : 765,400.12 = 299,990.16 : x
  2. Step 2: Convert to fraction form
    554,639.58/765,400.12 = 299,990.16/x
  3. Step 3: Cross multiply
    554,639.58x = 765,400.12 × 299,990.16
  4. Step 4: Simplify right side
    554,639.58x = 229,612,503,712.84
  5. Step 5: Solve for x
    x = 229,612,503,712.84/554,639.58
  6. Step 6: Final answer
    x = 413,985.07

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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.