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Finding the Fourth Proportional to 290,229.92, 399,802.28 and 247,070.28

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Solution

The fourth proportional to 290,229.92, 399,802.28 and 247,070.28 is: 340,348.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,229.92 : 399,802.28 = 247,070.28 : x
  2. Step 2: Convert to fraction form
    290,229.92/399,802.28 = 247,070.28/x
  3. Step 3: Cross multiply
    290,229.92x = 399,802.28 × 247,070.28
  4. Step 4: Simplify right side
    290,229.92x = 98,779,261,264.24
  5. Step 5: Solve for x
    x = 98,779,261,264.24/290,229.92
  6. Step 6: Final answer
    x = 340,348.30

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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.