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Finding the Fourth Proportional to 485,386.37, 728,030.34 and 130,354.25

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Solution

The fourth proportional to 485,386.37, 728,030.34 and 130,354.25 is: 195,518.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,386.37 : 728,030.34 = 130,354.25 : x
  2. Step 2: Convert to fraction form
    485,386.37/728,030.34 = 130,354.25/x
  3. Step 3: Cross multiply
    485,386.37x = 728,030.34 × 130,354.25
  4. Step 4: Simplify right side
    485,386.37x = 94,901,850,768.02
  5. Step 5: Solve for x
    x = 94,901,850,768.02/485,386.37
  6. Step 6: Final answer
    x = 195,518.16

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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.