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Finding the Fourth Proportional to 402,497.57, 555,459.15 and 221,206.21

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Solution

The fourth proportional to 402,497.57, 555,459.15 and 221,206.21 is: 305,271.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,497.57 : 555,459.15 = 221,206.21 : x
  2. Step 2: Convert to fraction form
    402,497.57/555,459.15 = 221,206.21/x
  3. Step 3: Cross multiply
    402,497.57x = 555,459.15 × 221,206.21
  4. Step 4: Simplify right side
    402,497.57x = 122,871,013,381.32
  5. Step 5: Solve for x
    x = 122,871,013,381.32/402,497.57
  6. Step 6: Final answer
    x = 305,271.44

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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.