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Finding the Fourth Proportional to 656,970.50, 906,621.45 and 355,166.66

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Solution

The fourth proportional to 656,970.50, 906,621.45 and 355,166.66 is: 490,131.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,970.50 : 906,621.45 = 355,166.66 : x
  2. Step 2: Convert to fraction form
    656,970.50/906,621.45 = 355,166.66/x
  3. Step 3: Cross multiply
    656,970.50x = 906,621.45 × 355,166.66
  4. Step 4: Simplify right side
    656,970.50x = 322,001,712,280.86
  5. Step 5: Solve for x
    x = 322,001,712,280.86/656,970.50
  6. Step 6: Final answer
    x = 490,131.16

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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.