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Finding the Fourth Proportional to 720,056.88, 993,799.80 and 418,425.84

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Solution

The fourth proportional to 720,056.88, 993,799.80 and 418,425.84 is: 577,498.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,056.88 : 993,799.80 = 418,425.84 : x
  2. Step 2: Convert to fraction form
    720,056.88/993,799.80 = 418,425.84/x
  3. Step 3: Cross multiply
    720,056.88x = 993,799.80 × 418,425.84
  4. Step 4: Simplify right side
    720,056.88x = 415,831,516,106.83
  5. Step 5: Solve for x
    x = 415,831,516,106.83/720,056.88
  6. Step 6: Final answer
    x = 577,498.15

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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.