Home / 651,182.40-976,627.80-428,108.40

Finding the Fourth Proportional to 651,182.40, 976,627.80 and 428,108.40

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Solution

The fourth proportional to 651,182.40, 976,627.80 and 428,108.40 is: 642,066.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,182.40 : 976,627.80 = 428,108.40 : x
  2. Step 2: Convert to fraction form
    651,182.40/976,627.80 = 428,108.40/x
  3. Step 3: Cross multiply
    651,182.40x = 976,627.80 × 428,108.40
  4. Step 4: Simplify right side
    651,182.40x = 418,102,564,853.52
  5. Step 5: Solve for x
    x = 418,102,564,853.52/651,182.40
  6. Step 6: Final answer
    x = 642,066.75

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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.