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Finding the Fourth Proportional to 720,031.38, 992,899.05 and 618,393.38

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Solution

The fourth proportional to 720,031.38, 992,899.05 and 618,393.38 is: 852,743.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,031.38 : 992,899.05 = 618,393.38 : x
  2. Step 2: Convert to fraction form
    720,031.38/992,899.05 = 618,393.38/x
  3. Step 3: Cross multiply
    720,031.38x = 992,899.05 × 618,393.38
  4. Step 4: Simplify right side
    720,031.38x = 614,002,199,528.29
  5. Step 5: Solve for x
    x = 614,002,199,528.29/720,031.38
  6. Step 6: Final answer
    x = 852,743.67

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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.