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Finding the Fourth Proportional to 384,482.28, 530,583.81 and 212,400.30

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Solution

The fourth proportional to 384,482.28, 530,583.81 and 212,400.30 is: 293,111.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,482.28 : 530,583.81 = 212,400.30 : x
  2. Step 2: Convert to fraction form
    384,482.28/530,583.81 = 212,400.30/x
  3. Step 3: Cross multiply
    384,482.28x = 530,583.81 × 212,400.30
  4. Step 4: Simplify right side
    384,482.28x = 112,696,159,622.64
  5. Step 5: Solve for x
    x = 112,696,159,622.64/384,482.28
  6. Step 6: Final answer
    x = 293,111.45

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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.