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Finding the Fourth Proportional to 690,663.92, 953,079.24 and 380,556.88

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Solution

The fourth proportional to 690,663.92, 953,079.24 and 380,556.88 is: 525,148.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,663.92 : 953,079.24 = 380,556.88 : x
  2. Step 2: Convert to fraction form
    690,663.92/953,079.24 = 380,556.88/x
  3. Step 3: Cross multiply
    690,663.92x = 953,079.24 × 380,556.88
  4. Step 4: Simplify right side
    690,663.92x = 362,700,861,967.17
  5. Step 5: Solve for x
    x = 362,700,861,967.17/690,663.92
  6. Step 6: Final answer
    x = 525,148.12

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1.5x scale

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.