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Finding the Fourth Proportional to 978,072.90, 1,467,109.35 and 346,904.70

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Solution

The fourth proportional to 978,072.90, 1,467,109.35 and 346,904.70 is: 520,357.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,072.90 : 1,467,109.35 = 346,904.70 : x
  2. Step 2: Convert to fraction form
    978,072.90/1,467,109.35 = 346,904.70/x
  3. Step 3: Cross multiply
    978,072.90x = 1,467,109.35 × 346,904.70
  4. Step 4: Simplify right side
    978,072.90x = 508,947,128,928.95
  5. Step 5: Solve for x
    x = 508,947,128,928.95/978,072.90
  6. Step 6: Final answer
    x = 520,357.05

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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.