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Finding the Fourth Proportional to 368,465.60, 551,920.80 and 289,150.40

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Solution

The fourth proportional to 368,465.60, 551,920.80 and 289,150.40 is: 433,115.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,465.60 : 551,920.80 = 289,150.40 : x
  2. Step 2: Convert to fraction form
    368,465.60/551,920.80 = 289,150.40/x
  3. Step 3: Cross multiply
    368,465.60x = 551,920.80 × 289,150.40
  4. Step 4: Simplify right side
    368,465.60x = 159,588,120,088.32
  5. Step 5: Solve for x
    x = 159,588,120,088.32/368,465.60
  6. Step 6: Final answer
    x = 433,115.38

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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.