Home / 678,641.60-1,019,128.80-657,646.40

Finding the Fourth Proportional to 678,641.60, 1,019,128.80 and 657,646.40

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Solution

The fourth proportional to 678,641.60, 1,019,128.80 and 657,646.40 is: 987,599.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,641.60 : 1,019,128.80 = 657,646.40 : x
  2. Step 2: Convert to fraction form
    678,641.60/1,019,128.80 = 657,646.40/x
  3. Step 3: Cross multiply
    678,641.60x = 1,019,128.80 × 657,646.40
  4. Step 4: Simplify right side
    678,641.60x = 670,226,386,456.32
  5. Step 5: Solve for x
    x = 670,226,386,456.32/678,641.60
  6. Step 6: Final answer
    x = 987,599.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.