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Finding the Fourth Proportional to 649,476.40, 971,590.20 and 561,704.80

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Solution

The fourth proportional to 649,476.40, 971,590.20 and 561,704.80 is: 840,287.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,476.40 : 971,590.20 = 561,704.80 : x
  2. Step 2: Convert to fraction form
    649,476.40/971,590.20 = 561,704.80/x
  3. Step 3: Cross multiply
    649,476.40x = 971,590.20 × 561,704.80
  4. Step 4: Simplify right side
    649,476.40x = 545,746,878,972.96
  5. Step 5: Solve for x
    x = 545,746,878,972.96/649,476.40
  6. Step 6: Final answer
    x = 840,287.47

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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.