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Finding the Fourth Proportional to 978,985.34, 1,351,140.48 and 543,502.64

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Solution

The fourth proportional to 978,985.34, 1,351,140.48 and 543,502.64 is: 750,111.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,985.34 : 1,351,140.48 = 543,502.64 : x
  2. Step 2: Convert to fraction form
    978,985.34/1,351,140.48 = 543,502.64/x
  3. Step 3: Cross multiply
    978,985.34x = 1,351,140.48 × 543,502.64
  4. Step 4: Simplify right side
    978,985.34x = 734,348,417,890.87
  5. Step 5: Solve for x
    x = 734,348,417,890.87/978,985.34
  6. Step 6: Final answer
    x = 750,111.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.