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Finding the Fourth Proportional to 459,987.89, 690,009.51 and 144,444.80

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Solution

The fourth proportional to 459,987.89, 690,009.51 and 144,444.80 is: 216,675.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,987.89 : 690,009.51 = 144,444.80 : x
  2. Step 2: Convert to fraction form
    459,987.89/690,009.51 = 144,444.80/x
  3. Step 3: Cross multiply
    459,987.89x = 690,009.51 × 144,444.80
  4. Step 4: Simplify right side
    459,987.89x = 99,668,282,220.00
  5. Step 5: Solve for x
    x = 99,668,282,220.00/459,987.89
  6. Step 6: Final answer
    x = 216,675.89

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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.