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Finding the Fourth Proportional to 692,242.48, 955,295.40 and 390,436.48

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Solution

The fourth proportional to 692,242.48, 955,295.40 and 390,436.48 is: 538,802.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,242.48 : 955,295.40 = 390,436.48 : x
  2. Step 2: Convert to fraction form
    692,242.48/955,295.40 = 390,436.48/x
  3. Step 3: Cross multiply
    692,242.48x = 955,295.40 × 390,436.48
  4. Step 4: Simplify right side
    692,242.48x = 372,982,173,336.19
  5. Step 5: Solve for x
    x = 372,982,173,336.19/692,242.48
  6. Step 6: Final answer
    x = 538,802.78

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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.