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Finding the Fourth Proportional to 720,055.88, 993,798.42 and 418,424.84

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Solution

The fourth proportional to 720,055.88, 993,798.42 and 418,424.84 is: 577,496.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,055.88 : 993,798.42 = 418,424.84 : x
  2. Step 2: Convert to fraction form
    720,055.88/993,798.42 = 418,424.84/x
  3. Step 3: Cross multiply
    720,055.88x = 993,798.42 × 418,424.84
  4. Step 4: Simplify right side
    720,055.88x = 415,829,944,880.75
  5. Step 5: Solve for x
    x = 415,829,944,880.75/720,055.88
  6. Step 6: Final answer
    x = 577,496.77

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Double scale
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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.