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Finding the Fourth Proportional to 666,970.66, 920,417.61 and 365,162.50

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Solution

The fourth proportional to 666,970.66, 920,417.61 and 365,162.50 is: 503,923.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,970.66 : 920,417.61 = 365,162.50 : x
  2. Step 2: Convert to fraction form
    666,970.66/920,417.61 = 365,162.50/x
  3. Step 3: Cross multiply
    666,970.66x = 920,417.61 × 365,162.50
  4. Step 4: Simplify right side
    666,970.66x = 336,101,995,511.63
  5. Step 5: Solve for x
    x = 336,101,995,511.63/666,970.66
  6. Step 6: Final answer
    x = 503,923.21

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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.