Home / 739,435.64-1,020,421.86-399,903.89

Finding the Fourth Proportional to 739,435.64, 1,020,421.86 and 399,903.89

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Solution

The fourth proportional to 739,435.64, 1,020,421.86 and 399,903.89 is: 551,867.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,435.64 : 1,020,421.86 = 399,903.89 : x
  2. Step 2: Convert to fraction form
    739,435.64/1,020,421.86 = 399,903.89/x
  3. Step 3: Cross multiply
    739,435.64x = 1,020,421.86 × 399,903.89
  4. Step 4: Simplify right side
    739,435.64x = 408,070,671,479.15
  5. Step 5: Solve for x
    x = 408,070,671,479.15/739,435.64
  6. Step 6: Final answer
    x = 551,867.74

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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.