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Finding the Fourth Proportional to 740.18, 1,021.48 and 429.68

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Solution

The fourth proportional to 740.18, 1,021.48 and 429.68 is: 592.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.18 : 1,021.48 = 429.68 : x
  2. Step 2: Convert to fraction form
    740.18/1,021.48 = 429.68/x
  3. Step 3: Cross multiply
    740.18x = 1,021.48 × 429.68
  4. Step 4: Simplify right side
    740.18x = 438,909.53
  5. Step 5: Solve for x
    x = 438,909.53/740.18
  6. Step 6: Final answer
    x = 592.98

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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.