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Finding the Fourth Proportional to 318,612.72, 439,685.64 and 175,371.72

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Solution

The fourth proportional to 318,612.72, 439,685.64 and 175,371.72 is: 242,013.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,612.72 : 439,685.64 = 175,371.72 : x
  2. Step 2: Convert to fraction form
    318,612.72/439,685.64 = 175,371.72/x
  3. Step 3: Cross multiply
    318,612.72x = 439,685.64 × 175,371.72
  4. Step 4: Simplify right side
    318,612.72x = 77,108,426,946.10
  5. Step 5: Solve for x
    x = 77,108,426,946.10/318,612.72
  6. Step 6: Final answer
    x = 242,013.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.