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Finding the Fourth Proportional to 643,802.79, 888,242.18 and 371,834.76

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Solution

The fourth proportional to 643,802.79, 888,242.18 and 371,834.76 is: 513,013.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,802.79 : 888,242.18 = 371,834.76 : x
  2. Step 2: Convert to fraction form
    643,802.79/888,242.18 = 371,834.76/x
  3. Step 3: Cross multiply
    643,802.79x = 888,242.18 × 371,834.76
  4. Step 4: Simplify right side
    643,802.79x = 330,279,315,963.00
  5. Step 5: Solve for x
    x = 330,279,315,963.00/643,802.79
  6. Step 6: Final answer
    x = 513,013.18

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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.