Home / 310,821.12-429,072-239,174.40

Finding the Fourth Proportional to 310,821.12, 429,072 and 239,174.40

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Solution

The fourth proportional to 310,821.12, 429,072 and 239,174.40 is: 330,167.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,821.12 : 429,072 = 239,174.40 : x
  2. Step 2: Convert to fraction form
    310,821.12/429,072 = 239,174.40/x
  3. Step 3: Cross multiply
    310,821.12x = 429,072 × 239,174.40
  4. Step 4: Simplify right side
    310,821.12x = 102,623,038,156.80
  5. Step 5: Solve for x
    x = 102,623,038,156.80/310,821.12
  6. Step 6: Final answer
    x = 330,167.52

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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.