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Finding the Fourth Proportional to 877,312.80, 1,316,098.80 and 278,330.40

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Solution

The fourth proportional to 877,312.80, 1,316,098.80 and 278,330.40 is: 417,536.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,312.80 : 1,316,098.80 = 278,330.40 : x
  2. Step 2: Convert to fraction form
    877,312.80/1,316,098.80 = 278,330.40/x
  3. Step 3: Cross multiply
    877,312.80x = 1,316,098.80 × 278,330.40
  4. Step 4: Simplify right side
    877,312.80x = 366,310,305,443.52
  5. Step 5: Solve for x
    x = 366,310,305,443.52/877,312.80
  6. Step 6: Final answer
    x = 417,536.72

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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.