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Finding the Fourth Proportional to 387,017.92, 533,830.26 and 243,657.64

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Solution

The fourth proportional to 387,017.92, 533,830.26 and 243,657.64 is: 336,087.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,017.92 : 533,830.26 = 243,657.64 : x
  2. Step 2: Convert to fraction form
    387,017.92/533,830.26 = 243,657.64/x
  3. Step 3: Cross multiply
    387,017.92x = 533,830.26 × 243,657.64
  4. Step 4: Simplify right side
    387,017.92x = 130,071,821,312.19
  5. Step 5: Solve for x
    x = 130,071,821,312.19/387,017.92
  6. Step 6: Final answer
    x = 336,087.33

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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.