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Finding the Fourth Proportional to 489,030.40, 732,379.20 and 239,420.80

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Solution

The fourth proportional to 489,030.40, 732,379.20 and 239,420.80 is: 358,560.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,030.40 : 732,379.20 = 239,420.80 : x
  2. Step 2: Convert to fraction form
    489,030.40/732,379.20 = 239,420.80/x
  3. Step 3: Cross multiply
    489,030.40x = 732,379.20 × 239,420.80
  4. Step 4: Simplify right side
    489,030.40x = 175,346,813,967.36
  5. Step 5: Solve for x
    x = 175,346,813,967.36/489,030.40
  6. Step 6: Final answer
    x = 358,560.15

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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.