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Finding the Fourth Proportional to 421,665.53, 581,899.13 and 249,722.20

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Solution

The fourth proportional to 421,665.53, 581,899.13 and 249,722.20 is: 344,617.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,665.53 : 581,899.13 = 249,722.20 : x
  2. Step 2: Convert to fraction form
    421,665.53/581,899.13 = 249,722.20/x
  3. Step 3: Cross multiply
    421,665.53x = 581,899.13 × 249,722.20
  4. Step 4: Simplify right side
    421,665.53x = 145,313,130,091.24
  5. Step 5: Solve for x
    x = 145,313,130,091.24/421,665.53
  6. Step 6: Final answer
    x = 344,617.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.