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Finding the Fourth Proportional to 489,292.60, 733,938.90 and 312,145.60

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Solution

The fourth proportional to 489,292.60, 733,938.90 and 312,145.60 is: 468,218.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,292.60 : 733,938.90 = 312,145.60 : x
  2. Step 2: Convert to fraction form
    489,292.60/733,938.90 = 312,145.60/x
  3. Step 3: Cross multiply
    489,292.60x = 733,938.90 × 312,145.60
  4. Step 4: Simplify right side
    489,292.60x = 229,095,798,303.84
  5. Step 5: Solve for x
    x = 229,095,798,303.84/489,292.60
  6. Step 6: Final answer
    x = 468,218.40

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Similar ratio
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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.