Home / 642,938.70-962,516.18-429,176.40

Finding the Fourth Proportional to 642,938.70, 962,516.18 and 429,176.40

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Solution

The fourth proportional to 642,938.70, 962,516.18 and 429,176.40 is: 642,501.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,938.70 : 962,516.18 = 429,176.40 : x
  2. Step 2: Convert to fraction form
    642,938.70/962,516.18 = 429,176.40/x
  3. Step 3: Cross multiply
    642,938.70x = 962,516.18 × 429,176.40
  4. Step 4: Simplify right side
    642,938.70x = 413,089,226,928.27
  5. Step 5: Solve for x
    x = 413,089,226,928.27/642,938.70
  6. Step 6: Final answer
    x = 642,501.73

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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.