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Finding the Fourth Proportional to 608,347.72, 912,670.26 and 428,783.32

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Solution

The fourth proportional to 608,347.72, 912,670.26 and 428,783.32 is: 643,279.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,347.72 : 912,670.26 = 428,783.32 : x
  2. Step 2: Convert to fraction form
    608,347.72/912,670.26 = 428,783.32/x
  3. Step 3: Cross multiply
    608,347.72x = 912,670.26 × 428,783.32
  4. Step 4: Simplify right side
    608,347.72x = 391,337,784,148.06
  5. Step 5: Solve for x
    x = 391,337,784,148.06/608,347.72
  6. Step 6: Final answer
    x = 643,279.77

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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.