Home / 402,138.13-555,166.07-310,056.30

Finding the Fourth Proportional to 402,138.13, 555,166.07 and 310,056.30

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Solution

The fourth proportional to 402,138.13, 555,166.07 and 310,056.30 is: 428,043.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,138.13 : 555,166.07 = 310,056.30 : x
  2. Step 2: Convert to fraction form
    402,138.13/555,166.07 = 310,056.30/x
  3. Step 3: Cross multiply
    402,138.13x = 555,166.07 × 310,056.30
  4. Step 4: Simplify right side
    402,138.13x = 172,132,737,549.74
  5. Step 5: Solve for x
    x = 172,132,737,549.74/402,138.13
  6. Step 6: Final answer
    x = 428,043.81

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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.