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Finding the Fourth Proportional to 478,558.80, 717,838.20 and 268,169.40

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Solution

The fourth proportional to 478,558.80, 717,838.20 and 268,169.40 is: 402,254.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,558.80 : 717,838.20 = 268,169.40 : x
  2. Step 2: Convert to fraction form
    478,558.80/717,838.20 = 268,169.40/x
  3. Step 3: Cross multiply
    478,558.80x = 717,838.20 × 268,169.40
  4. Step 4: Simplify right side
    478,558.80x = 192,502,239,391.08
  5. Step 5: Solve for x
    x = 192,502,239,391.08/478,558.80
  6. Step 6: Final answer
    x = 402,254.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.