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Finding the Fourth Proportional to 409,424.70, 614,223.45 and 128,970.30

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Solution

The fourth proportional to 409,424.70, 614,223.45 and 128,970.30 is: 193,482.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,424.70 : 614,223.45 = 128,970.30 : x
  2. Step 2: Convert to fraction form
    409,424.70/614,223.45 = 128,970.30/x
  3. Step 3: Cross multiply
    409,424.70x = 614,223.45 × 128,970.30
  4. Step 4: Simplify right side
    409,424.70x = 79,216,582,613.54
  5. Step 5: Solve for x
    x = 79,216,582,613.54/409,424.70
  6. Step 6: Final answer
    x = 193,482.67

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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.