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Finding the Fourth Proportional to 478,813.70, 718,220.55 and 146,389.70

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Solution

The fourth proportional to 478,813.70, 718,220.55 and 146,389.70 is: 219,584.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,813.70 : 718,220.55 = 146,389.70 : x
  2. Step 2: Convert to fraction form
    478,813.70/718,220.55 = 146,389.70/x
  3. Step 3: Cross multiply
    478,813.70x = 718,220.55 × 146,389.70
  4. Step 4: Simplify right side
    478,813.70x = 105,140,090,848.34
  5. Step 5: Solve for x
    x = 105,140,090,848.34/478,813.70
  6. Step 6: Final answer
    x = 219,584.55

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Similar ratio
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1.5x scale

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.