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Finding the Fourth Proportional to 646,645.20, 969,967.80 and 394,702.80

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Solution

The fourth proportional to 646,645.20, 969,967.80 and 394,702.80 is: 592,054.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,645.20 : 969,967.80 = 394,702.80 : x
  2. Step 2: Convert to fraction form
    646,645.20/969,967.80 = 394,702.80/x
  3. Step 3: Cross multiply
    646,645.20x = 969,967.80 × 394,702.80
  4. Step 4: Simplify right side
    646,645.20x = 382,849,006,569.84
  5. Step 5: Solve for x
    x = 382,849,006,569.84/646,645.20
  6. Step 6: Final answer
    x = 592,054.20

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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.