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Finding the Fourth Proportional to 299,390.80, 448,430.10 and 266,148.40

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Solution

The fourth proportional to 299,390.80, 448,430.10 and 266,148.40 is: 398,639.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,390.80 : 448,430.10 = 266,148.40 : x
  2. Step 2: Convert to fraction form
    299,390.80/448,430.10 = 266,148.40/x
  3. Step 3: Cross multiply
    299,390.80x = 448,430.10 × 266,148.40
  4. Step 4: Simplify right side
    299,390.80x = 119,348,953,626.84
  5. Step 5: Solve for x
    x = 119,348,953,626.84/299,390.80
  6. Step 6: Final answer
    x = 398,639.35

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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.