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Finding the Fourth Proportional to 666,895.28, 920,315.52 and 365,089.28

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Solution

The fourth proportional to 666,895.28, 920,315.52 and 365,089.28 is: 503,823.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,895.28 : 920,315.52 = 365,089.28 : x
  2. Step 2: Convert to fraction form
    666,895.28/920,315.52 = 365,089.28/x
  3. Step 3: Cross multiply
    666,895.28x = 920,315.52 × 365,089.28
  4. Step 4: Simplify right side
    666,895.28x = 335,997,330,569.63
  5. Step 5: Solve for x
    x = 335,997,330,569.63/666,895.28
  6. Step 6: Final answer
    x = 503,823.22

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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.