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Finding the Fourth Proportional to 645,700.48, 891,054.40 and 359,219.68

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Solution

The fourth proportional to 645,700.48, 891,054.40 and 359,219.68 is: 495,716.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,700.48 : 891,054.40 = 359,219.68 : x
  2. Step 2: Convert to fraction form
    645,700.48/891,054.40 = 359,219.68/x
  3. Step 3: Cross multiply
    645,700.48x = 891,054.40 × 359,219.68
  4. Step 4: Simplify right side
    645,700.48x = 320,084,276,430.59
  5. Step 5: Solve for x
    x = 320,084,276,430.59/645,700.48
  6. Step 6: Final answer
    x = 495,716.34

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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.