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Finding the Fourth Proportional to 480,013.60, 720,020.40 and 291,056.80

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Solution

The fourth proportional to 480,013.60, 720,020.40 and 291,056.80 is: 436,585.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,013.60 : 720,020.40 = 291,056.80 : x
  2. Step 2: Convert to fraction form
    480,013.60/720,020.40 = 291,056.80/x
  3. Step 3: Cross multiply
    480,013.60x = 720,020.40 × 291,056.80
  4. Step 4: Simplify right side
    480,013.60x = 209,566,833,558.72
  5. Step 5: Solve for x
    x = 209,566,833,558.72/480,013.60
  6. Step 6: Final answer
    x = 436,585.20

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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.