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Finding the Fourth Proportional to 402,666.20, 603,999.30 and 153,315.80

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Solution

The fourth proportional to 402,666.20, 603,999.30 and 153,315.80 is: 229,973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,666.20 : 603,999.30 = 153,315.80 : x
  2. Step 2: Convert to fraction form
    402,666.20/603,999.30 = 153,315.80/x
  3. Step 3: Cross multiply
    402,666.20x = 603,999.30 × 153,315.80
  4. Step 4: Simplify right side
    402,666.20x = 92,602,635,878.94
  5. Step 5: Solve for x
    x = 92,602,635,878.94/402,666.20
  6. Step 6: Final answer
    x = 229,973.70

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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.