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Finding the Fourth Proportional to 459,510.80, 689,266.44 and 143,992.40

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Solution

The fourth proportional to 459,510.80, 689,266.44 and 143,992.40 is: 215,988.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,510.80 : 689,266.44 = 143,992.40 : x
  2. Step 2: Convert to fraction form
    459,510.80/689,266.44 = 143,992.40/x
  3. Step 3: Cross multiply
    459,510.80x = 689,266.44 × 143,992.40
  4. Step 4: Simplify right side
    459,510.80x = 99,249,128,935.06
  5. Step 5: Solve for x
    x = 99,249,128,935.06/459,510.80
  6. Step 6: Final answer
    x = 215,988.68

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Similar ratio
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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.