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Finding the Fourth Proportional to 611,721.60, 917,582.40 and 359,123.10

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Solution

The fourth proportional to 611,721.60, 917,582.40 and 359,123.10 is: 538,684.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,721.60 : 917,582.40 = 359,123.10 : x
  2. Step 2: Convert to fraction form
    611,721.60/917,582.40 = 359,123.10/x
  3. Step 3: Cross multiply
    611,721.60x = 917,582.40 × 359,123.10
  4. Step 4: Simplify right side
    611,721.60x = 329,525,035,993.44
  5. Step 5: Solve for x
    x = 329,525,035,993.44/611,721.60
  6. Step 6: Final answer
    x = 538,684.65

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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.