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Finding the Fourth Proportional to 402,681.24, 555,701.22 and 221,411.70

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Solution

The fourth proportional to 402,681.24, 555,701.22 and 221,411.70 is: 305,548.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,681.24 : 555,701.22 = 221,411.70 : x
  2. Step 2: Convert to fraction form
    402,681.24/555,701.22 = 221,411.70/x
  3. Step 3: Cross multiply
    402,681.24x = 555,701.22 × 221,411.70
  4. Step 4: Simplify right side
    402,681.24x = 123,038,751,812.27
  5. Step 5: Solve for x
    x = 123,038,751,812.27/402,681.24
  6. Step 6: Final answer
    x = 305,548.76

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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.