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Finding the Fourth Proportional to 434,479.60, 651,719.40 and 210,012.40

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Solution

The fourth proportional to 434,479.60, 651,719.40 and 210,012.40 is: 315,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,479.60 : 651,719.40 = 210,012.40 : x
  2. Step 2: Convert to fraction form
    434,479.60/651,719.40 = 210,012.40/x
  3. Step 3: Cross multiply
    434,479.60x = 651,719.40 × 210,012.40
  4. Step 4: Simplify right side
    434,479.60x = 136,869,155,320.56
  5. Step 5: Solve for x
    x = 136,869,155,320.56/434,479.60
  6. Step 6: Final answer
    x = 315,018.60

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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.