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Finding the Fourth Proportional to 553,612.51, 763,985.25 and 298,963.69

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Solution

The fourth proportional to 553,612.51, 763,985.25 and 298,963.69 is: 412,569.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,612.51 : 763,985.25 = 298,963.69 : x
  2. Step 2: Convert to fraction form
    553,612.51/763,985.25 = 298,963.69/x
  3. Step 3: Cross multiply
    553,612.51x = 763,985.25 × 298,963.69
  4. Step 4: Simplify right side
    553,612.51x = 228,403,849,445.57
  5. Step 5: Solve for x
    x = 228,403,849,445.57/553,612.51
  6. Step 6: Final answer
    x = 412,569.88

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Double scale
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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.