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Finding the Fourth Proportional to 646,880.40, 970,666.20 and 291,949.20

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Solution

The fourth proportional to 646,880.40, 970,666.20 and 291,949.20 is: 438,079.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,880.40 : 970,666.20 = 291,949.20 : x
  2. Step 2: Convert to fraction form
    646,880.40/970,666.20 = 291,949.20/x
  3. Step 3: Cross multiply
    646,880.40x = 970,666.20 × 291,949.20
  4. Step 4: Simplify right side
    646,880.40x = 283,385,220,557.04
  5. Step 5: Solve for x
    x = 283,385,220,557.04/646,880.40
  6. Step 6: Final answer
    x = 438,079.78

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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.