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Finding the Fourth Proportional to 478,673.70, 718,010.55 and 455,345.70

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Solution

The fourth proportional to 478,673.70, 718,010.55 and 455,345.70 is: 683,018.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,673.70 : 718,010.55 = 455,345.70 : x
  2. Step 2: Convert to fraction form
    478,673.70/718,010.55 = 455,345.70/x
  3. Step 3: Cross multiply
    478,673.70x = 718,010.55 × 455,345.70
  4. Step 4: Simplify right side
    478,673.70x = 326,943,016,497.14
  5. Step 5: Solve for x
    x = 326,943,016,497.14/478,673.70
  6. Step 6: Final answer
    x = 683,018.55

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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.