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Finding the Fourth Proportional to 210,448.40, 315,689.04 and 70,206.88

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Solution

The fourth proportional to 210,448.40, 315,689.04 and 70,206.88 is: 105,315.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,448.40 : 315,689.04 = 70,206.88 : x
  2. Step 2: Convert to fraction form
    210,448.40/315,689.04 = 70,206.88/x
  3. Step 3: Cross multiply
    210,448.40x = 315,689.04 × 70,206.88
  4. Step 4: Simplify right side
    210,448.40x = 22,163,542,548.60
  5. Step 5: Solve for x
    x = 22,163,542,548.60/210,448.40
  6. Step 6: Final answer
    x = 105,315.80

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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.