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Finding the Fourth Proportional to 307,447.78, 424,278.51 and 171,490.53

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Solution

The fourth proportional to 307,447.78, 424,278.51 and 171,490.53 is: 236,657.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,447.78 : 424,278.51 = 171,490.53 : x
  2. Step 2: Convert to fraction form
    307,447.78/424,278.51 = 171,490.53/x
  3. Step 3: Cross multiply
    307,447.78x = 424,278.51 × 171,490.53
  4. Step 4: Simplify right side
    307,447.78x = 72,759,746,547.51
  5. Step 5: Solve for x
    x = 72,759,746,547.51/307,447.78
  6. Step 6: Final answer
    x = 236,657.26

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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.