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Finding the Fourth Proportional to 489,385.60, 734,078.40 and 340,086.40

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Solution

The fourth proportional to 489,385.60, 734,078.40 and 340,086.40 is: 510,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,385.60 : 734,078.40 = 340,086.40 : x
  2. Step 2: Convert to fraction form
    489,385.60/734,078.40 = 340,086.40/x
  3. Step 3: Cross multiply
    489,385.60x = 734,078.40 × 340,086.40
  4. Step 4: Simplify right side
    489,385.60x = 249,650,080,373.76
  5. Step 5: Solve for x
    x = 249,650,080,373.76/489,385.60
  6. Step 6: Final answer
    x = 510,129.60

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Similar ratio
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1.5x scale

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.