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Finding the Fourth Proportional to 424,000.40, 636,000.60 and 421,047.95

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Solution

The fourth proportional to 424,000.40, 636,000.60 and 421,047.95 is: 631,571.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,000.40 : 636,000.60 = 421,047.95 : x
  2. Step 2: Convert to fraction form
    424,000.40/636,000.60 = 421,047.95/x
  3. Step 3: Cross multiply
    424,000.40x = 636,000.60 × 421,047.95
  4. Step 4: Simplify right side
    424,000.40x = 267,786,748,828.77
  5. Step 5: Solve for x
    x = 267,786,748,828.77/424,000.40
  6. Step 6: Final answer
    x = 631,571.93

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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.