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Finding the Fourth Proportional to 558,939.80, 838,409.70 and 402,642.20

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Solution

The fourth proportional to 558,939.80, 838,409.70 and 402,642.20 is: 603,963.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,939.80 : 838,409.70 = 402,642.20 : x
  2. Step 2: Convert to fraction form
    558,939.80/838,409.70 = 402,642.20/x
  3. Step 3: Cross multiply
    558,939.80x = 838,409.70 × 402,642.20
  4. Step 4: Simplify right side
    558,939.80x = 337,579,126,109.34
  5. Step 5: Solve for x
    x = 337,579,126,109.34/558,939.80
  6. Step 6: Final answer
    x = 603,963.30

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1.5x scale

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.