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Finding the Fourth Proportional to 649,760.40, 974,494.80 and 426,686.40

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Solution

The fourth proportional to 649,760.40, 974,494.80 and 426,686.40 is: 639,933.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,760.40 : 974,494.80 = 426,686.40 : x
  2. Step 2: Convert to fraction form
    649,760.40/974,494.80 = 426,686.40/x
  3. Step 3: Cross multiply
    649,760.40x = 974,494.80 × 426,686.40
  4. Step 4: Simplify right side
    649,760.40x = 415,803,678,030.72
  5. Step 5: Solve for x
    x = 415,803,678,030.72/649,760.40
  6. Step 6: Final answer
    x = 639,933.86

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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.