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Finding the Fourth Proportional to 406.04, 560.58 and 307.40

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Solution

The fourth proportional to 406.04, 560.58 and 307.40 is: 424.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.04 : 560.58 = 307.40 : x
  2. Step 2: Convert to fraction form
    406.04/560.58 = 307.40/x
  3. Step 3: Cross multiply
    406.04x = 560.58 × 307.40
  4. Step 4: Simplify right side
    406.04x = 172,322.29
  5. Step 5: Solve for x
    x = 172,322.29/406.04
  6. Step 6: Final answer
    x = 424.40

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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.