Home / 651,346.40-976,873.80-428,272.40

Finding the Fourth Proportional to 651,346.40, 976,873.80 and 428,272.40

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Solution

The fourth proportional to 651,346.40, 976,873.80 and 428,272.40 is: 642,312.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,346.40 : 976,873.80 = 428,272.40 : x
  2. Step 2: Convert to fraction form
    651,346.40/976,873.80 = 428,272.40/x
  3. Step 3: Cross multiply
    651,346.40x = 976,873.80 × 428,272.40
  4. Step 4: Simplify right side
    651,346.40x = 418,368,086,823.12
  5. Step 5: Solve for x
    x = 418,368,086,823.12/651,346.40
  6. Step 6: Final answer
    x = 642,312.73

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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.