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Finding the Fourth Proportional to 877,920.32, 1,316,870.88 and 213,072.32

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Solution

The fourth proportional to 877,920.32, 1,316,870.88 and 213,072.32 is: 319,606.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,920.32 : 1,316,870.88 = 213,072.32 : x
  2. Step 2: Convert to fraction form
    877,920.32/1,316,870.88 = 213,072.32/x
  3. Step 3: Cross multiply
    877,920.32x = 1,316,870.88 × 213,072.32
  4. Step 4: Simplify right side
    877,920.32x = 280,588,733,542.04
  5. Step 5: Solve for x
    x = 280,588,733,542.04/877,920.32
  6. Step 6: Final answer
    x = 319,606.15

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1.5x scale

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.