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Finding the Fourth Proportional to 476,875.86, 715,424.52 and 139,902.90

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Solution

The fourth proportional to 476,875.86, 715,424.52 and 139,902.90 is: 209,886.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,875.86 : 715,424.52 = 139,902.90 : x
  2. Step 2: Convert to fraction form
    476,875.86/715,424.52 = 139,902.90/x
  3. Step 3: Cross multiply
    476,875.86x = 715,424.52 × 139,902.90
  4. Step 4: Simplify right side
    476,875.86x = 100,089,965,079.11
  5. Step 5: Solve for x
    x = 100,089,965,079.11/476,875.86
  6. Step 6: Final answer
    x = 209,886.84

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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.