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Finding the Fourth Proportional to 691,319.68, 954,120 and 389,541.76

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Solution

The fourth proportional to 691,319.68, 954,120 and 389,541.76 is: 537,623.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,319.68 : 954,120 = 389,541.76 : x
  2. Step 2: Convert to fraction form
    691,319.68/954,120 = 389,541.76/x
  3. Step 3: Cross multiply
    691,319.68x = 954,120 × 389,541.76
  4. Step 4: Simplify right side
    691,319.68x = 371,669,584,051.20
  5. Step 5: Solve for x
    x = 371,669,584,051.20/691,319.68
  6. Step 6: Final answer
    x = 537,623.32

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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.