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Finding the Fourth Proportional to 978,840.76, 1,350,809.47 and 549,130.11

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Solution

The fourth proportional to 978,840.76, 1,350,809.47 and 549,130.11 is: 757,804.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,840.76 : 1,350,809.47 = 549,130.11 : x
  2. Step 2: Convert to fraction form
    978,840.76/1,350,809.47 = 549,130.11/x
  3. Step 3: Cross multiply
    978,840.76x = 1,350,809.47 × 549,130.11
  4. Step 4: Simplify right side
    978,840.76x = 741,770,152,980.47
  5. Step 5: Solve for x
    x = 741,770,152,980.47/978,840.76
  6. Step 6: Final answer
    x = 757,804.73

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Why These Related Problems?

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