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Finding the Fourth Proportional to 875,128.50, 1,207,678.41 and 472,720.50

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Solution

The fourth proportional to 875,128.50, 1,207,678.41 and 472,720.50 is: 652,354.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,128.50 : 1,207,678.41 = 472,720.50 : x
  2. Step 2: Convert to fraction form
    875,128.50/1,207,678.41 = 472,720.50/x
  3. Step 3: Cross multiply
    875,128.50x = 1,207,678.41 × 472,720.50
  4. Step 4: Simplify right side
    875,128.50x = 570,894,341,814.41
  5. Step 5: Solve for x
    x = 570,894,341,814.41/875,128.50
  6. Step 6: Final answer
    x = 652,354.87

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.