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Finding the Fourth Proportional to 489,665.40, 734,498.10 and 340,366.20

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Solution

The fourth proportional to 489,665.40, 734,498.10 and 340,366.20 is: 510,549.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,665.40 : 734,498.10 = 340,366.20 : x
  2. Step 2: Convert to fraction form
    489,665.40/734,498.10 = 340,366.20/x
  3. Step 3: Cross multiply
    489,665.40x = 734,498.10 × 340,366.20
  4. Step 4: Simplify right side
    489,665.40x = 249,998,327,204.22
  5. Step 5: Solve for x
    x = 249,998,327,204.22/489,665.40
  6. Step 6: Final answer
    x = 510,549.30

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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.