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Finding the Fourth Proportional to 611,534.40, 918,176.40 and 434,824.80

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Solution

The fourth proportional to 611,534.40, 918,176.40 and 434,824.80 is: 652,859.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,534.40 : 918,176.40 = 434,824.80 : x
  2. Step 2: Convert to fraction form
    611,534.40/918,176.40 = 434,824.80/x
  3. Step 3: Cross multiply
    611,534.40x = 918,176.40 × 434,824.80
  4. Step 4: Simplify right side
    611,534.40x = 399,245,869,494.72
  5. Step 5: Solve for x
    x = 399,245,869,494.72/611,534.40
  6. Step 6: Final answer
    x = 652,859.22

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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.