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Finding the Fourth Proportional to 286,615.40, 429,923.10 and 109,063.40

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Solution

The fourth proportional to 286,615.40, 429,923.10 and 109,063.40 is: 163,595.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,615.40 : 429,923.10 = 109,063.40 : x
  2. Step 2: Convert to fraction form
    286,615.40/429,923.10 = 109,063.40/x
  3. Step 3: Cross multiply
    286,615.40x = 429,923.10 × 109,063.40
  4. Step 4: Simplify right side
    286,615.40x = 46,888,875,024.54
  5. Step 5: Solve for x
    x = 46,888,875,024.54/286,615.40
  6. Step 6: Final answer
    x = 163,595.10

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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.