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Finding the Fourth Proportional to 554,039.64, 764,501.04 and 312,332.40

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Solution

The fourth proportional to 554,039.64, 764,501.04 and 312,332.40 is: 430,977.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,039.64 : 764,501.04 = 312,332.40 : x
  2. Step 2: Convert to fraction form
    554,039.64/764,501.04 = 312,332.40/x
  3. Step 3: Cross multiply
    554,039.64x = 764,501.04 × 312,332.40
  4. Step 4: Simplify right side
    554,039.64x = 238,778,444,625.70
  5. Step 5: Solve for x
    x = 238,778,444,625.70/554,039.64
  6. Step 6: Final answer
    x = 430,977.19

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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.