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Finding the Fourth Proportional to 351,483.42, 526,870.12 and 138,400.87

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Solution

The fourth proportional to 351,483.42, 526,870.12 and 138,400.87 is: 207,461.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,483.42 : 526,870.12 = 138,400.87 : x
  2. Step 2: Convert to fraction form
    351,483.42/526,870.12 = 138,400.87/x
  3. Step 3: Cross multiply
    351,483.42x = 526,870.12 × 138,400.87
  4. Step 4: Simplify right side
    351,483.42x = 72,919,282,569.21
  5. Step 5: Solve for x
    x = 72,919,282,569.21/351,483.42
  6. Step 6: Final answer
    x = 207,461.52

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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.