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Finding the Fourth Proportional to 987,312, 1,480,968 and 239,358

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Solution

The fourth proportional to 987,312, 1,480,968 and 239,358 is: 359,037

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,312 : 1,480,968 = 239,358 : x
  2. Step 2: Convert to fraction form
    987,312/1,480,968 = 239,358/x
  3. Step 3: Cross multiply
    987,312x = 1,480,968 × 239,358
  4. Step 4: Simplify right side
    987,312x = 354,481,538,544
  5. Step 5: Solve for x
    x = 354,481,538,544/987,312
  6. Step 6: Final answer
    x = 359,037

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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.