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Finding the Fourth Proportional to 402,482.46, 555,389.64 and 221,192.40

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Solution

The fourth proportional to 402,482.46, 555,389.64 and 221,192.40 is: 305,225.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,482.46 : 555,389.64 = 221,192.40 : x
  2. Step 2: Convert to fraction form
    402,482.46/555,389.64 = 221,192.40/x
  3. Step 3: Cross multiply
    402,482.46x = 555,389.64 × 221,192.40
  4. Step 4: Simplify right side
    402,482.46x = 122,847,967,406.74
  5. Step 5: Solve for x
    x = 122,847,967,406.74/402,482.46
  6. Step 6: Final answer
    x = 305,225.64

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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.