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Finding the Fourth Proportional to 480,784.32, 721,172.16 and 338,040.72

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Solution

The fourth proportional to 480,784.32, 721,172.16 and 338,040.72 is: 507,058.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,784.32 : 721,172.16 = 338,040.72 : x
  2. Step 2: Convert to fraction form
    480,784.32/721,172.16 = 338,040.72/x
  3. Step 3: Cross multiply
    480,784.32x = 721,172.16 × 338,040.72
  4. Step 4: Simplify right side
    480,784.32x = 243,785,556,210.36
  5. Step 5: Solve for x
    x = 243,785,556,210.36/480,784.32
  6. Step 6: Final answer
    x = 507,058.04

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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.