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Finding the Fourth Proportional to 353,889.40, 530,830.80 and 143,477.32

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Solution

The fourth proportional to 353,889.40, 530,830.80 and 143,477.32 is: 215,214.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,889.40 : 530,830.80 = 143,477.32 : x
  2. Step 2: Convert to fraction form
    353,889.40/530,830.80 = 143,477.32/x
  3. Step 3: Cross multiply
    353,889.40x = 530,830.80 × 143,477.32
  4. Step 4: Simplify right side
    353,889.40x = 76,162,180,557.46
  5. Step 5: Solve for x
    x = 76,162,180,557.46/353,889.40
  6. Step 6: Final answer
    x = 215,214.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.