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Finding the Fourth Proportional to 661,330.78, 912,707.84 and 374,820.10

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Solution

The fourth proportional to 661,330.78, 912,707.84 and 374,820.10 is: 517,292.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,330.78 : 912,707.84 = 374,820.10 : x
  2. Step 2: Convert to fraction form
    661,330.78/912,707.84 = 374,820.10/x
  3. Step 3: Cross multiply
    661,330.78x = 912,707.84 × 374,820.10
  4. Step 4: Simplify right side
    661,330.78x = 342,101,243,859.58
  5. Step 5: Solve for x
    x = 342,101,243,859.58/661,330.78
  6. Step 6: Final answer
    x = 517,292.18

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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.