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Finding the Fourth Proportional to 646,872.80, 970,309.20 and 553,560.80

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Solution

The fourth proportional to 646,872.80, 970,309.20 and 553,560.80 is: 830,341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,872.80 : 970,309.20 = 553,560.80 : x
  2. Step 2: Convert to fraction form
    646,872.80/970,309.20 = 553,560.80/x
  3. Step 3: Cross multiply
    646,872.80x = 970,309.20 × 553,560.80
  4. Step 4: Simplify right side
    646,872.80x = 537,125,136,999.36
  5. Step 5: Solve for x
    x = 537,125,136,999.36/646,872.80
  6. Step 6: Final answer
    x = 830,341.20

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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.