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Finding the Fourth Proportional to 666,689.52, 920,008.08 and 380,301.12

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Solution

The fourth proportional to 666,689.52, 920,008.08 and 380,301.12 is: 524,802.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,689.52 : 920,008.08 = 380,301.12 : x
  2. Step 2: Convert to fraction form
    666,689.52/920,008.08 = 380,301.12/x
  3. Step 3: Cross multiply
    666,689.52x = 920,008.08 × 380,301.12
  4. Step 4: Simplify right side
    666,689.52x = 349,880,103,233.05
  5. Step 5: Solve for x
    x = 349,880,103,233.05/666,689.52
  6. Step 6: Final answer
    x = 524,802.16

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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.