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Finding the Fourth Proportional to 661,521.60, 912,837.60 and 457,790.40

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Solution

The fourth proportional to 661,521.60, 912,837.60 and 457,790.40 is: 631,707.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,521.60 : 912,837.60 = 457,790.40 : x
  2. Step 2: Convert to fraction form
    661,521.60/912,837.60 = 457,790.40/x
  3. Step 3: Cross multiply
    661,521.60x = 912,837.60 × 457,790.40
  4. Step 4: Simplify right side
    661,521.60x = 417,888,290,039.04
  5. Step 5: Solve for x
    x = 417,888,290,039.04/661,521.60
  6. Step 6: Final answer
    x = 631,707.70

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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.