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Finding the Fourth Proportional to 489,386.60, 734,079.90 and 340,087.40

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Solution

The fourth proportional to 489,386.60, 734,079.90 and 340,087.40 is: 510,131.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,386.60 : 734,079.90 = 340,087.40 : x
  2. Step 2: Convert to fraction form
    489,386.60/734,079.90 = 340,087.40/x
  3. Step 3: Cross multiply
    489,386.60x = 734,079.90 × 340,087.40
  4. Step 4: Simplify right side
    489,386.60x = 249,651,324,583.26
  5. Step 5: Solve for x
    x = 249,651,324,583.26/489,386.60
  6. Step 6: Final answer
    x = 510,131.10

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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.