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Finding the Fourth Proportional to 489,946.90, 734,920.35 and 407,002.90

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Solution

The fourth proportional to 489,946.90, 734,920.35 and 407,002.90 is: 610,504.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,946.90 : 734,920.35 = 407,002.90 : x
  2. Step 2: Convert to fraction form
    489,946.90/734,920.35 = 407,002.90/x
  3. Step 3: Cross multiply
    489,946.90x = 734,920.35 × 407,002.90
  4. Step 4: Simplify right side
    489,946.90x = 299,114,713,719.02
  5. Step 5: Solve for x
    x = 299,114,713,719.02/489,946.90
  6. Step 6: Final answer
    x = 610,504.35

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Double scale
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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.