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Finding the Fourth Proportional to 874,309.32, 1,310,545.08 and 400,605.12

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Solution

The fourth proportional to 874,309.32, 1,310,545.08 and 400,605.12 is: 600,486.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,309.32 : 1,310,545.08 = 400,605.12 : x
  2. Step 2: Convert to fraction form
    874,309.32/1,310,545.08 = 400,605.12/x
  3. Step 3: Cross multiply
    874,309.32x = 1,310,545.08 × 400,605.12
  4. Step 4: Simplify right side
    874,309.32x = 525,011,069,038.81
  5. Step 5: Solve for x
    x = 525,011,069,038.81/874,309.32
  6. Step 6: Final answer
    x = 600,486.64

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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.