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Finding the Fourth Proportional to 764,853.12, 1,055,373.12 and 425,312.64

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Solution

The fourth proportional to 764,853.12, 1,055,373.12 and 425,312.64 is: 586,862.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,853.12 : 1,055,373.12 = 425,312.64 : x
  2. Step 2: Convert to fraction form
    764,853.12/1,055,373.12 = 425,312.64/x
  3. Step 3: Cross multiply
    764,853.12x = 1,055,373.12 × 425,312.64
  4. Step 4: Simplify right side
    764,853.12x = 448,863,527,852.24
  5. Step 5: Solve for x
    x = 448,863,527,852.24/764,853.12
  6. Step 6: Final answer
    x = 586,862.39

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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.