Home / 402,320.49-555,062.67-257,211.21

Finding the Fourth Proportional to 402,320.49, 555,062.67 and 257,211.21

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Solution

The fourth proportional to 402,320.49, 555,062.67 and 257,211.21 is: 354,862.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,320.49 : 555,062.67 = 257,211.21 : x
  2. Step 2: Convert to fraction form
    402,320.49/555,062.67 = 257,211.21/x
  3. Step 3: Cross multiply
    402,320.49x = 555,062.67 × 257,211.21
  4. Step 4: Simplify right side
    402,320.49x = 142,768,340,976.53
  5. Step 5: Solve for x
    x = 142,768,340,976.53/402,320.49
  6. Step 6: Final answer
    x = 354,862.22

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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.